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+# Quick-check baseline refresh on master `c317c7e4` and `969c49e2`, and one look at Lagan `features read` (@perf, 2026-10-12)
+
+Asked by the main session: refresh `docs/benchmarks/quick/baseline-ac.json`
+(stored on increment 35's head `357808b1`, 2026-10-11, master `3e6f87eb` plus
+increment 35) on master `c317c7e4`, after #230, #231 (36), #232 (26a), #233,
+#234 and #235 (26b) merged; and look once at Lagan's `features read`, which
+read +12 to +17 % against that baseline on the main session's three idle runs
+of 2026-10-12 (`docs/increments/26-land-cover.md`, section 14). The refresh
+rule: `docs/increments/perf-quick-check.md`, section 3, *The baseline*, (b).
+
+## Result in one paragraph
+
+Two quick checks on master this afternoon (15:19 and 15:30 local, AC) read
+**every** case 6 to 15 % slower than the stored baseline, including
+single-thread C++ refine on byte-identical meshes (`tile t=1 refine` +15.5 %)
+and a `_core.so` byte-identical to the one the main session's idle run used
+at 11:15 (SHA-256 `55bb3993…`, both built from `c317c7e4`). The machine was
+in interactive use (load average 3 to 4.5, WindowServer at 30 % CPU; no video
+call), and the same `.so` was within band on every phase but one at 12:10 UTC,
+so these runs measure the machine, not master. **The record saved by run 2 is
+kept here as `baseline-ac-candidate-loaded-1530.json`, not installed as the
+baseline**: a baseline 6 to 15 % slow on unchanged code would hide a
+regression of that size until the next refresh. Lagan `features read` is
+**not a code change**: the baseline's own commit and `.so`, run back to back
+with master, reads 1.107 s against master's 1.103 s (medians of 3), both
+against 0.922 s stored; the profile shows the same call counts and times on
+both trees. See *Lagan `features read`* below. The idle refresh: *Run 3* found no idle minute in
+the afternoon; **the evening's *Run 4* did it** (20:29 local, idle, AC) and
+installed the new baseline, and *Run 5* is increment 38's quick check against
+it: `NO CHANGE`, every mesh identical.
+
+## Method
+
+- Tree: `/Users/skavhaug/projects/rasputin/.claude/worktrees/baseline-1012`
+  at `c317c7e4` (master), its own `build-bench` (Release, `-O3 -DNDEBUG`,
+  hardening ON, AppleClang 21.0.0) and its own `.venv`, pinned to the stored
+  baseline's machine record: Python 3.14.7, numpy 2.5.4, shapely 2.2.0 on
+  GEOS 3.14.1, pyproj 3.8.0 on PROJ 9.8.1 (`uv pip freeze` of the
+  `mapbiomas-26b` worktree's venv, `tin_engine` itself through `bench.py`'s
+  `pkg` tree). The main checkout's `.venv` has numpy 2.5.3 and would give
+  `NO BASELINE: machine numpy`.
+- Command: `RASPUTIN_DATA=/Users/skavhaug/projects/rasputin_data
+  .venv/bin/python tools/bench_quick.py run [--save-baseline]`, run from the
+  worktree, nothing of ours beside it. Script version: `tools/bench_quick.py`
+  and `tools/bench.py` at `c317c7e4`.
+- Machine: Apple M1 Max (8 P + 2 E cores, 32 GB), macOS 27.0. Power: AC,
+  battery 100 %, `pmset -g batt` before and after each run (in the logs).
+  `pmset -g therm`: no thermal or performance warning recorded.
+- Foreign load, checked before each run (`ps`, `top`, `uptime`): no video
+  call; WindowServer 29 to 32 % CPU, loginwindow 13 %, iTerm2 11 %, Safari
+  8 %, Slack idle; load averages 2.7 / 4.3 / 5.6 before run 1, 3.0 / 3.4 /
+  4.3 before run 2, 4.5 after it. The machine was being used.
+- Old tree for the profile: a scratch worktree of `357808b1` (the stored
+  baseline's commit; its `io/`, `feature_input.py`, `crs.py` and `cli.py`
+  are identical to master `3e6f87eb`'s, `git diff --stat 3e6f87eb 357808b1 --
+  src_python/tin_engine/io src_python/tin_engine/cli.py` is empty), built the
+  same way; its `.so` SHA-256 `51872f0a…` equals the `cleanup-speed`
+  worktree's, which made the stored baseline. Removed after the run.
+
+## Run 1 (15:19, judged against the stored baseline): `SLOWER`, exit 1
+
+`quick-run-1.log`. Fourteen `SLOWER` lines, no `MESH CHANGED`, no `BROKEN`:
+
+| line | stored | run 1 | change | band |
+|---|---:|---:|---:|---:|
+| tile t=1 total | 0.70 | 0.78 | +10.9 % | 5.0 % |
+| tile t=1 refine | 0.47 | 0.52 | +11.2 % | 5.0 % |
+| numedalslagen total | 8.83 | 9.48 | +7.3 % | 5.0 % |
+| numedalslagen decode | 0.92 | 1.00 | +8.5 % | 5.0 % |
+| numedalslagen features clip | 6.00 | 6.38 | +6.3 % | 5.0 % |
+| numedalslagen features clip: clean-up | 5.94 | 6.31 | +6.3 % | 5.0 % |
+| lagan total | 14.54 | 15.49 | +6.5 % | 5.0 % |
+| lagan features read | 0.92 | 1.10 | +19.8 % | 5.5 % |
+| lagan features clip | 6.34 | 6.69 | +5.5 % | 5.0 % |
+| lagan features clip: clean-up | 5.39 | 5.68 | +5.4 % | 5.0 % |
+| romsdal-slope total | 3.58 | 3.92 | +9.5 % | 5.0 % |
+| romsdal-slope refine | 2.01 | 2.24 | +11.3 % | 5.0 % |
+| romsdal-slope refine: scan (parallel) | 0.56 | 0.63 | +11.5 % | 5.0 % |
+| romsdal-slope refine: split + flip (serial) | 1.18 | 1.33 | +12.5 % | 5.0 % |
+
+## Run 2 (15:30, `--save-baseline`): `SLOWER`, exit 1; record not installed
+
+`quick-run-2-save.log`; the record it wrote is
+`baseline-ac-candidate-loaded-1530.json` (commit `c317c7e4`, power `ac`).
+The full table against the stored baseline, every phase at 5 % or more of its
+case's total, is `raw/delta-stored-vs-loaded-1530.md`; the totals:
+
+| case | stored s | run 2 s | change | mesh SHA-256 |
+|---|---:|---:|---:|---|
+| tile | 0.416 | 0.453 | +8.9 % | same |
+| tile t=1 | 0.699 | 0.789 | +12.8 % | same |
+| quarter | 0.355 | 0.388 | +9.3 % | same |
+| numedalslagen | 8.829 | 9.343 | +5.8 % | same |
+| lagan | 14.542 | 15.483 | +6.5 % | same |
+| geilo-al-ramp | 0.329 | 0.364 | +10.9 % | same |
+| romsdal-slope | 3.578 | 3.876 | +8.3 % | same |
+
+**Phases that moved more than their band, and why.** Every one. None ties to
+a merge: the refine phases are C++ in a `.so` identical to the one within
+band at 11:15 today, on meshes identical to the stored ones (`tile t=1
+refine` +15.5 %, `romsdal-slope refine: split + flip (serial)` +12.9 %, both
+serial C++); `decode` is tifffile and numpy, unchanged since the baseline
+(`tile decode` +12 %); `features clip` is GEOS, unchanged (+5.7 % and +6.2 %).
+A merge that slowed one phase would not slow every phase by about the same
+share. The cause is the machine's state this afternoon (measured: the load
+averages above; the same binary within band at 12:10 UTC per increment 26,
+section 14). What in the machine's state, I did not measure.
+
+The seven `HOTSPOT` lines (tile and quarter `refine`, `tile t=1 refine: scan
+(parallel)`, Numedalslågen `features clip: clean-up`, `geilo-al-ramp decode`,
+`romsdal-slope refine`) have been printed on every quick check since
+2026-10-10 (`docs/benchmarks/2026-10-10/slope-tol/quick/head-run.log`);
+nothing new. Numedalslågen `features clip` is ruled in `hotspots.toml`
+(2026-10-12, 68 %) and prints nothing; its `clean-up` sub-row at 67 % is the
+same work under the same ruling.
+
+## Lagan `features read`: machine, not code (one look, 12 minutes)
+
+What the phase does: `cli._open_features` times `feature_input.open_features`
+and subtracts the clip (`src_python/tin_engine/cli.py@c317c7e4:1854`): the
+CORINE GeoPackage
+(8.9 GB, EPSG:3035) is queried through its rtree for the Lagan box
+(`io/geopackage.query_features`, 7867 calls), each WKB blob decoded to
+shapely (`decode_geometry`), reprojected to EPSG:3006 through pyproj
+(`crs.reprojector`, `_transformer` builds the `Transformer`), and tested
+against the domain. Of the files the task named, `io/repository.py` and
+`io/models.py` changed since the baseline (`create_sqlite`,
+`CachedObject.fetched`, `ClassWindow`, `ClassFractions`, `SrsEntry`), but
+none of the new code is on this path: `open_geopackage` and `query_features`
+are unchanged, and `crs.py`'s only change is the added `srs_entry` (36).
+
+Measured, both trees back to back, alternating, same venv and inputs,
+`tools/bench.py _child` without the profiler (`raw/lagan-plain-runs.jsonl`):
+
+| tree | features read s (3 runs) | median | total s median |
+|---|---|---:|---:|
+| old `357808b1` (the baseline's own commit and `.so`) | 1.107, 1.133, 1.093 | **1.107** | 15.491 |
+| new `c317c7e4` (master) | 1.131, 1.103, 1.102 | **1.103** | 15.541 |
+| stored baseline (2026-10-11 evening) | | 0.922 | 14.542 |
+
+The baseline's own code reads 1.10 s today. So the +14 to +20 % is not a
+change in `io/repository.py`, `io/models.py` or anything else between the
+two commits; it is the machine today against the machine on 2026-10-11
+evening. The input fingerprints match (the tool would have said
+`NO BASELINE: input` otherwise), so it is not the data.
+
+Under cProfile (`raw/lagan-profile-read-path.txt`, two runs per tree):
+`open_features` cumulative 8.52 / 8.51 s old, 8.53 / 8.50 s new;
+`read_source` 1.07 / 1.09 s old, 1.11 / 1.07 s new; `query_features` 7867
+calls, 1.05 / 1.07 s old, 1.09 / 1.05 s new; `decode_geometry` 7866 calls,
+0.20 s on both. Same call counts, same times. The only sub-step that leaned
+one way in both pairs is `crs._transformer` (pyproj `Transformer.from_crs`,
+PROJ database work, about 60 primitive calls): 0.46 / 0.59 s old, 0.73 /
+0.75 s new, under the profiler; it did not show in the unprofiled phase
+above, and the function is the same text on both trees. Not a hotspot: the
+phase is 7 % of the run (1.09 of 15.48 s), under the 40 % rule of section 5;
+no `hotspots.toml` line is due. (Bookkeeping: the profiled runs passed
+`--stats --binary`, and `--stats` took `--binary` as its report path, so they
+wrote a text mesh and a report file named `--binary`, removed; all four used
+the same arguments, so the old-new comparison holds. The unprofiled runs
+above were `--binary`.)
+
+## Run 3 (idle wait, then `--save-baseline`)
+
+A waiter (`raw/wait_idle_then_save.sh`) sampled the 1-minute load average
+every 30 s and was to run `--save-baseline` once it read under 1.5 twice in
+a row, within 45 minutes. See `quick-run-3-idle-save.log`.
+
+**It never ran.** From 15:34 to 16:19 the 1-minute load average stayed between
+1.50 and 5.11 (46 samples, in the log), never under 1.5 on two samples in a
+row; the waiter gave up at the cap, exit 4. **The stored baseline
+(`357808b1`, 2026-10-11) stayed installed this afternoon; the evening's run 4
+replaced it (below).**
+The refresh is one command on an idle machine (about 4 minutes, nothing else
+timed): from a checkout whose venv matches the stored machine record (numpy
+2.5.4), `RASPUTIN_DATA=<data> .venv/bin/python tools/bench_quick.py run
+--save-baseline` on master. Its judge lines against the stored baseline should
+then show the refine phases within band; if they again read +6 to +15 % on an
+idle machine, that is a finding about the machine since 2026-10-11, not about
+master, and needs a look at the machine, not the code.
+
+## Evening: run 4, the idle refresh, and run 5, increment 38's quick check
+
+### Method
+
+- The Swedish catchment batch finished at 18:05 UTC; Ola away. `origin/master`
+  `f09b9863` merged into this branch as `969c49e2` (what master gained since
+  the afternoon's `c317c7e4`: #236, increment 37, the MCP server, Python
+  only; #237 the generality audit and #238 a retrospective, both prose).
+  `_core` rebuilt Release into this tree's `build-bench`: SHA-256
+  `55bb3993…`, byte-identical to the afternoon's and to the main session's
+  11:15 build, so master's C++ is unchanged since `c317c7e4`.
+- Same venv, machine record, command and data as the afternoon (above);
+  script version `tools/bench_quick.py` and `tools/bench.py` at `969c49e2`
+  (unchanged since `c317c7e4`). The waiter
+  `raw/evening_idle_save_then_38.sh` sampled the 1-minute load every 30 s and
+  started run 4 once it read under 2.0 twice in a row, then run 5 straight
+  after; nothing of ours beside either. The 30 samples are in
+  `quick-run-4-idle-save.log`: 28 at 2.03 to 3.37 from 20:15 to 20:28, then
+  the two that fired, 1.96 and 1.76 at 20:29. `ps` before each run: no video call, no
+  batch; iTerm2's `pidinfo` helper at 75 % of one core (it polls the agent
+  panel), WindowServer no longer in the top six. Power: AC, battery 100 %,
+  `pmset -g batt` before and after each run in the logs.
+- Increment 38's tree: `/Users/skavhaug/projects/rasputin/.claude/worktrees/threads`,
+  branch `worktree-threads` at `8f9289c4` (`--threads` and `--memory-budget`
+  as settings; Python only). Its merge base with master is `5d2e706d`, master
+  before #238 (prose), and `git diff --name-only 5d2e706d 8f9289c4` lists no
+  C++ or CMake file; its `build-bench/_core…so`, built by the tool, is the
+  same `55bb3993…`. Run through this tree's venv and `tools/bench_quick.py
+  run --tree <threads>`, so it was judged against the baseline run 4 saved.
+
+### Run 4 (20:29, `--save-baseline`, idle, AC): baseline installed
+
+`quick-run-4-idle-save.log`, exit 2: `baseline saved`, then **`NO BASELINE:
+input $RASPUTIN_DATA/sweden_glo30_cache changed`** — the Lagan case's GLO-30
+cache directory gained tiles when the Swedish batch's fetch filled it, so its
+fingerprint moved from `dir:3deaa80f…` to `dir:f00da080…`; the tool refuses
+to judge across an input change, and the new baseline carries the new
+fingerprint. The other nine inputs and the machine record are unchanged. The
+installed record is `docs/benchmarks/quick/baseline-ac.json` (commit
+`969c49e2`, power `ac`), copied here as `baseline-ac-new-969c49e2.json`.
+
+Judged against the stored `357808b1` record as the tool would have, had the
+fingerprint matched (`verdict` over the two records with the old inputs
+substituted; the full table is `raw/delta-old-357808b1-vs-new-969c49e2.md`):
+**one line beyond its band, no `MESH CHANGED`, no `BROKEN`**; every case's
+mesh SHA-256 and `max_error` equal the stored ones.
+
+| line | stored | run 4 | change | band |
+|---|---:|---:|---:|---:|
+| lagan features read | 0.92 | 1.03 | +12.1 % | 5.5 % |
+
+The totals and the C++ phases:
+
+| case | stored s | run 4 s | change | refine (change) | mesh |
+|---|---:|---:|---:|---|---|
+| tile | 0.416 | 0.430 | +3.3 % | +1.2 % | same |
+| tile t=1 | 0.699 | 0.711 | +1.7 % | +0.2 % | same |
+| quarter | 0.355 | 0.366 | +3.1 % | -0.4 % | same |
+| numedalslagen | 8.829 | 8.894 | +0.7 % | +0.4 % | same |
+| lagan | 14.542 | 14.736 | +1.3 % | (under 5 % of the run) | same |
+| geilo-al-ramp | 0.329 | 0.344 | +4.7 % | +1.5 % | same |
+| romsdal-slope | 3.578 | 3.624 | +1.3 % | +0.1 % | same |
+
+So the afternoon's +6 to +15 % on every phase was the machine, as the
+afternoon section says: idle, the same `.so` reads within 1.5 % of the stored
+baseline on every refine phase. No merge since `357808b1` moved a phase.
+`lagan features read` stays +12 % on an idle machine (1.030 to 1.071 s over
+the three timed runs, so not a cache warming within the run); it is not code
+(the baseline's own commit read the same 1.10 s back to back with master this
+afternoon, *Lagan `features read`* above), and what in the machine's state
+since 2026-10-11 makes the CORINE GeoPackage query slower by 0.11 s was not
+measured. The small `decode` phases (+7 to +16 %, 0.007 to 0.010 s each) are
+under the tool's 0.05 s floor. The seven `HOTSPOT` lines are the ones printed
+on every quick check since 2026-10-10; nothing new.
+
+### Run 5 (20:31, increment 38 `8f9289c4` against the refreshed baseline): `NO CHANGE`
+
+`quick-run-5-increment-38.log`, exit 0. The tool's judge lines are the
+seven standing `HOTSPOT` lines and `NO CHANGE`: no `SLOWER`, no `FASTER`,
+no `MESH CHANGED`, no `BROKEN`, no `NOT JUDGED`. So every case's mesh
+SHA-256 equals the baseline's (the tool prints `MESH CHANGED` for any case
+whose hash differs), every `max_error` is within its tolerance, and no phase
+at 5 % or more of its case's total moved beyond its band (5 %, or the
+baseline's spread) and 0.05 s. The tool keeps no record without
+`--save-baseline`, so run 5's per-phase figures are not stored; its verdict
+is the evidence. Consistent with the design's claim of bit-identical meshes
+and no timing change.
+
+## Verdict
+
+- Refresh: **done in the evening (run 4)**: `docs/benchmarks/quick/baseline-ac.json`
+  is now master `f09b9863`'s code on `969c49e2`, idle, AC, with the Lagan
+  GLO-30 cache's new fingerprint. Against the old `357808b1` baseline: no
+  mesh changed, `max_error` within tolerance on every case, refine phases
+  within 1.5 %; one line beyond its band, `lagan features read` +12.1 %
+  (0.11 s), machine-side (see above), cause within the machine not measured.
+  The afternoon's runs 1 and 2 measured a loaded machine, not a merge.
+- Increment 38 (`8f9289c4`): **NO CHANGE** against the refreshed baseline;
+  meshes identical on every case; no phase outside its band.
+- Lagan `features read`: **machine, not code**; 7 % of the run, not a hotspot.
+
+## Files
+
+- `quick-run-1.log`, `quick-run-2-save.log`, `quick-run-3-idle-save.log`:
+  the tool's lines with `pmset` and `uptime` before and after.
+- `baseline-ac-old-357808b1.json`: the stored baseline as found.
+- `baseline-ac-candidate-loaded-1530.json`: run 2's record, not installed.
+- `raw/delta-stored-vs-loaded-1530.md`: stored vs run 2, every phase at 5 %
+  or more of its case.
+- `raw/lagan-plain-runs.jsonl`, `raw/lagan-profile-read-path.txt`,
+  `raw/prof_mesh.py`: the features-read look.
+- Evening: `quick-run-4-idle-save.log` (the load samples, then the refresh)
+  and `quick-run-5-increment-38.log`; `baseline-ac-new-969c49e2.json`, the
+  record installed as `docs/benchmarks/quick/baseline-ac.json`;
+  `raw/delta-old-357808b1-vs-new-969c49e2.md`, old vs new, every phase at
+  5 % or more of its case; `raw/evening_idle_save_then_38.sh`, the waiter
+  that ran both.
+- Meshes: each run's mesh went to a `rasputin-quick-*` temporary folder and
+  the session scratchpad; regenerate with the `cases.toml` arguments.
+
+## Review
+
+Round 1, 2026-10-12, @reviewer (`c31e55e7..fe06568c`, 0 production lines): CHANGES REQUESTED, one wording, applied in this recording commit: /Users/skavhaug/projects/rasputin/.claude/worktrees/baseline-1012/docs/benchmarks/2026-10-12/baseline-refresh/README.md@fe06568c:171-172 said the old baseline stays installed; run 4 replaced it. Suggestion applied: the title names `969c49e2`. Times before the evening section are local (CEST, UTC+2). Verified: the refresh rule is section 3 (b); runs 1 and 2 match their logs; both `_core` hashes `55bb3993`; the waiter's 30 samples (14-minute wait); run 4 saved, then NO BASELINE for the GLO-30 cache; installed baseline equal to the new copy, machine record equal, all seven meshes and max errors equal; run 5 (increment 38) NO CHANGE; shipped tests pass; check_citations exit 0; merges clean onto master.
diff --git a/docs/benchmarks/2026-10-12/baseline-refresh/baseline-ac-candidate-loaded-1530.json b/docs/benchmarks/2026-10-12/baseline-refresh/baseline-ac-candidate-loaded-1530.json
new file mode 100644
index 00000000..4dea7a50
--- /dev/null
+++ b/docs/benchmarks/2026-10-12/baseline-refresh/baseline-ac-candidate-loaded-1530.json
@@ -0,0 +1,785 @@
+{
+ "commit": "c317c7e45a509bc9ab6d910d4a10e2d77dbb96b9",
+ "machine": {
+  "cpu_brand": "Apple M1 Max",
+  "p_cores": 8,
+  "e_cores": 2,
+  "memory_bytes": 34359738368,
+  "macos": "27.0",
+  "python": "3.14.7",
+  "numpy": "2.5.4",
+  "shapely": "2.2.0",
+  "geos": "3.14.1",
+  "pyproj": "3.8.0",
+  "proj": "9.8.1"
+ },
+ "power": "ac",
+ "inputs": {
+  "$TREE/tests/fixtures/dem_archive/7908_3_10m_z33.tif": "file:4426661:aabd0cbc28471ce8593e4c278381811bec3fbf4e1194058b3b4888d00c3af575",
+  "$TREE/docs/benchmarks/2026-09-26/quarter.geojson": "file:16426:b7f7bbe96848383c77863ce29ee28c45bce087601a1738ee82ddb4ffb8279d1e",
+  "$RASPUTIN_DATA/DTM10_UTM33_20260925": "dir:3eef3cfed8b6d7db435791da65386cc1dcbbbadc2a9b145567765eb67b1a3dac",
+  "$RASPUTIN_DATA/numedalslagen_outline_nve.geojson": "file:554438:3069b1dbd2c22c87401fd57c3189f5a67d319f9aea0a95e90cc29886fa0dabca",
+  "$RASPUTIN_DATA/corine2018_dtm10_utm33.gpkg": "file:440332288:1790574665364371436",
+  "$RASPUTIN_DATA/sweden_glo30_cache": "dir:3deaa80f96e39f4ae4b4d3df54646b17e47c70847fe450d9c3e377fe7d758e0f",
+  "$RASPUTIN_DATA/sweden_smhi_svar/lagan_mouth_svar2022_3006.geojson": "file:1294446:a93a524fc198bd3e516ea36db55734c3e5de3994be05e19c807ce5546454123e",
+  "$RASPUTIN_DATA/corine_sql/u2018_clc2018_v2020_20u1_geoPackage/DATA/U2018_CLC2018_V2020_20u1.gpkg": "file:8855322624:1587553228000000000",
+  "$RASPUTIN_DATA/banenor_banenettverk/section_domain.geojson": "file:2337:d3af5872ac6da011cc95eaade2328cfff965116a5756f68786cd1b1907d5e571",
+  "$RASPUTIN_DATA/banenor_banenettverk/bergensbanen.geojson": "file:2195883:75e725295b777190f1a1be72fc99eeb2689bff59c1e23e99eaa3339bbcfea2af"
+ },
+ "cases": {
+  "tile": {
+   "tolerance": 1.0,
+   "max_error": 0.9999759197235107,
+   "mesh_sha256": "746bf5c68bb9464fbb0746a9de6e0a5dbc7a15d1bfa1006cd9000f95d870ee0e",
+   "measures": {
+    "total": {
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diff --git a/docs/benchmarks/2026-10-12/baseline-refresh/baseline-ac-new-969c49e2.json b/docs/benchmarks/2026-10-12/baseline-refresh/baseline-ac-new-969c49e2.json
new file mode 100644
index 00000000..88129626
--- /dev/null
+++ b/docs/benchmarks/2026-10-12/baseline-refresh/baseline-ac-new-969c49e2.json
@@ -0,0 +1,785 @@
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diff --git a/docs/benchmarks/2026-10-12/baseline-refresh/baseline-ac-old-357808b1.json b/docs/benchmarks/2026-10-12/baseline-refresh/baseline-ac-old-357808b1.json
new file mode 100644
index 00000000..c4e09b53
--- /dev/null
+++ b/docs/benchmarks/2026-10-12/baseline-refresh/baseline-ac-old-357808b1.json
@@ -0,0 +1,785 @@
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+     "max": 0.295728834
+    },
+    "write: encode": {
+     "median": 0.009886292,
+     "min": 0.009834709,
+     "max": 0.009888417
+    },
+    "write: disk": {
+     "median": 0.006146209,
+     "min": 0.006043,
+     "max": 0.012273958
+    }
+   }
+  },
+  "lagan": {
+   "tolerance": 10.0,
+   "max_error": 9.999904677002576,
+   "mesh_sha256": "c0f3b555ddaffac4d38332b7f11a149e11e2039a66db6ff98695bf297a043d28",
+   "measures": {
+    "total": {
+     "median": 14.542084583,
+     "min": 14.535847917,
+     "max": 14.551780625
+    },
+    "domain read": {
+     "median": 0.042737541,
+     "min": 0.042447125,
+     "max": 0.043427792
+    },
+    "decode": {
+     "median": 4.578057291,
+     "min": 4.565632417,
+     "max": 4.584270167
+    },
+    "features read": {
+     "median": 0.921586470445618,
+     "min": 0.9120247770333663,
+     "max": 0.963109087315388
+    },
+    "features clip": {
+     "median": 6.342146404553205,
+     "min": 6.338787996675819,
+     "max": 6.34631439007353
+    },
+    "features clip: clean-up": {
+     "median": 5.392329290974885,
+     "min": 5.391268541919999,
+     "max": 5.398513959022239
+    },
+    "start mesh: build": {
+     "median": 0.003107875,
+     "min": 0.003080167,
+     "max": 0.003132375
+    },
+    "start mesh: node": {
+     "median": 0.306133667,
+     "min": 0.305732583,
+     "max": 0.306136959
+    },
+    "start mesh: triangulate": {
+     "median": 0.087295375,
+     "min": 0.087039208,
+     "max": 0.087431208
+    },
+    "start mesh: constraint edges": {
+     "median": 0.190978042,
+     "min": 0.190633125,
+     "max": 0.191376125
+    },
+    "refine": {
+     "median": 0.237921625,
+     "min": 0.237089709,
+     "max": 0.240623083
+    },
+    "refine: legalise start": {
+     "median": 0.004321209,
+     "min": 0.00430625,
+     "max": 0.004351125
+    },
+    "refine: start quality": {
+     "median": 0.063313916,
+     "min": 0.062647959,
+     "max": 0.063466458
+    },
+    "refine: scan (parallel)": {
+     "median": 0.05935803999999999,
+     "min": 0.059079792,
+     "max": 0.059541455
+    },
+    "refine: split + flip (serial)": {
+     "median": 0.054421622,
+     "min": 0.05414283399999999,
+     "max": 0.057798166000000005
+    },
+    "refine: setup + output": {
+     "median": 0.05646462800000002,
+     "min": 0.055953169999999997,
+     "max": 0.05646779299999999
+    },
+    "edge strip: generate": {
+     "median": 0.040602,
+     "min": 0.040267959,
+     "max": 0.040666834
+    },
+    "check points: project": {
+     "median": 0.6664140454959124,
+     "min": 0.6445603384636343,
+     "max": 0.6678974126698449
+    },
+    "check points: store": {
+     "median": 0.2739846293001653,
+     "min": 0.272586036511269,
+     "max": 0.27819728855660675
+    },
+    "final check: scan (parallel)": {
+     "median": 0.264481997,
+     "min": 0.262131541,
+     "max": 0.2656331669999999
+    },
+    "final check: split + flip (serial)": {
+     "median": 0.038177456,
+     "min": 0.037784956999999994,
+     "max": 0.03839912400000001
+    },
+    "trim": {
+     "median": 0.018914791,
+     "min": 0.018853458,
+     "max": 0.018928833
+    },
+    "land cover": {
+     "median": 0.211289208,
+     "min": 0.21093725,
+     "max": 0.211618625
+    },
+    "write: encode": {
+     "median": 0.008228792,
+     "min": 0.008190625,
+     "max": 0.008303584
+    },
+    "write: disk": {
+     "median": 0.004085541,
+     "min": 0.003913208,
+     "max": 0.0040945
+    }
+   }
+  },
+  "geilo-al-ramp": {
+   "tolerance": 20.0,
+   "max_error": 19.984358261826856,
+   "mesh_sha256": "9f01b9ac27e2d2d5d1970e69a174995ebf99e6582adc17e05b257c8bd3f4348e",
+   "measures": {
+    "total": {
+     "median": 0.328736709,
+     "min": 0.327646541,
+     "max": 0.331091417
+    },
+    "domain read": {
+     "median": 0.001223958,
+     "min": 0.001193125,
+     "max": 0.001237209
+    },
+    "decode": {
+     "median": 0.13842975,
+     "min": 0.138245292,
+     "max": 0.138948709
+    },
+    "start mesh: build": {
+     "median": 0.0001265,
+     "min": 0.000120417,
+     "max": 0.000132583
+    },
+    "start mesh: node": {
+     "median": 0.000077,
+     "min": 0.000072459,
+     "max": 0.000078542
+    },
+    "start mesh: triangulate": {
+     "median": 0.000032459,
+     "min": 0.000030375,
+     "max": 0.00003275
+    },
+    "start mesh: constraint edges": {
+     "median": 0.000096292,
+     "min": 0.000084584,
+     "max": 0.000099375
+    },
+    "refine": {
+     "median": 0.099222708,
+     "min": 0.099139917,
+     "max": 0.099541917
+    },
+    "refine: legalise start": {
+     "median": 3.084e-6,
+     "min": 3e-6,
+     "max": 3.125e-6
+    },
+    "refine: start quality": {
+     "median": 0.000154041,
+     "min": 0.000151959,
+     "max": 0.000155
+    },
+    "refine: scan (parallel)": {
+     "median": 0.08256295899999999,
+     "min": 0.082561748,
+     "max": 0.08276754300000001
+    },
+    "refine: split + flip (serial)": {
+     "median": 0.013793952,
+     "min": 0.013646123000000001,
+     "max": 0.013868874000000002
+    },
+    "refine: setup + output": {
+     "median": 0.0027748799999999935,
+     "min": 0.0026358320000000185,
+     "max": 0.0028224219999999772
+    },
+    "edge strip: generate": {
+     "median": 0.000566792,
+     "min": 0.000533875,
+     "max": 0.000601084
+    },
+    "edge strip: scan (parallel)": {
+     "median": 0.0006741659999999999,
+     "min": 0.000641333,
+     "max": 0.00072825
+    },
+    "edge strip: split + flip (serial)": {
+     "median": 0.000327834,
+     "min": 0.000243999,
+     "max": 0.000373084
+    },
+    "trim": {
+     "median": 0.002361208,
+     "min": 0.002238458,
+     "max": 0.002452459
+    },
+    "write: encode": {
+     "median": 0.004143583,
+     "min": 0.004069917,
+     "max": 0.004341125
+    },
+    "write: disk": {
+     "median": 0.000667291,
+     "min": 0.000614709,
+     "max": 0.00070875
+    }
+   }
+  },
+  "romsdal-slope": {
+   "tolerance": 10.0,
+   "max_error": 9.999908093780277,
+   "mesh_sha256": "992e49cbcbe4a781ff03783a820946b163869b2b4a1f02bb70927d94224c4197",
+   "measures": {
+    "total": {
+     "median": 3.578062333,
+     "min": 3.560890084,
+     "max": 3.61971725
+    },
+    "decode": {
+     "median": 0.067789542,
+     "min": 0.066407958,
+     "max": 0.070348
+    },
+    "start mesh: build": {
+     "median": 0.000172417,
+     "min": 0.000166208,
+     "max": 0.000173292
+    },
+    "start mesh: node": {
+     "median": 0.002643709,
+     "min": 0.002630709,
+     "max": 0.002646917
+    },
+    "start mesh: triangulate": {
+     "median": 0.029220125,
+     "min": 0.029195625,
+     "max": 0.029241125
+    },
+    "start mesh: constraint edges": {
+     "median": 0.006545333,
+     "min": 0.00654325,
+     "max": 0.006562417
+    },
+    "slope": {
+     "median": 0.105743292,
+     "min": 0.105629208,
+     "max": 0.106262166
+    },
+    "refine": {
+     "median": 2.008883625,
+     "min": 2.002274709,
+     "max": 2.010968792
+    },
+    "refine: legalise start": {
+     "median": 0.000462125,
+     "min": 0.000460083,
+     "max": 0.000474375
+    },
+    "refine: start quality": {
+     "median": 0.000755292,
+     "min": 0.0007465,
+     "max": 0.0007765
+    },
+    "refine: scan (parallel)": {
+     "median": 0.5638042910000002,
+     "min": 0.5638000879999999,
+     "max": 0.5670207089999998
+    },
+    "refine: split + flip (serial)": {
+     "median": 1.1840706219999997,
+     "min": 1.17977575,
+     "max": 1.1896711659999994
+    },
+    "refine: setup + output": {
+     "median": 0.25655571100000074,
+     "min": 0.2562801210000005,
+     "max": 0.25747379299999995
+    },
+    "edge strip: generate": {
+     "median": 0.001067875,
+     "min": 0.001059792,
+     "max": 0.001085375
+    },
+    "edge strip: scan (parallel)": {
+     "median": 0.009431124,
+     "min": 0.009402165999999998,
+     "max": 0.009484958
+    },
+    "edge strip: split + flip (serial)": {
+     "median": 0.013071624,
+     "min": 0.012965457999999997,
+     "max": 0.013226416000000001
+    },
+    "trim": {
+     "median": 0.117721459,
+     "min": 0.117681,
+     "max": 0.117933542
+    },
+    "write: encode": {
+     "median": 0.044901708,
+     "min": 0.044475291,
+     "max": 0.045232375
+    },
+    "write: disk": {
+     "median": 0.026688542,
+     "min": 0.02042975,
+     "max": 0.069523875
+    }
+   }
+  }
+ }
+}
diff --git a/docs/benchmarks/2026-10-12/baseline-refresh/quick-run-1.log b/docs/benchmarks/2026-10-12/baseline-refresh/quick-run-1.log
new file mode 100644
index 00000000..5badb7b9
--- /dev/null
+++ b/docs/benchmarks/2026-10-12/baseline-refresh/quick-run-1.log
@@ -0,0 +1,32 @@
+# run 1 (judge against stored baseline), 2026-10-12 15:19:24 +0200
+## pmset before
+Now drawing from 'AC Power'
+ -InternalBattery-0 (id=24117347)	100%; charged; 0:00 remaining present: true
+## uptime
+15:19  up 13 days,  4:25, 4 users, load averages: 2.74 4.29 5.58
+SLOWER: tile t=1 total 0.70 -> 0.78 s (+10.9 %, band 5.0 %)
+SLOWER: tile t=1 refine 0.47 -> 0.52 s (+11.2 %, band 5.0 %)
+SLOWER: numedalslagen total 8.83 -> 9.48 s (+7.3 %, band 5.0 %)
+SLOWER: numedalslagen decode 0.92 -> 1.00 s (+8.5 %, band 5.0 %)
+SLOWER: numedalslagen features clip 6.00 -> 6.38 s (+6.3 %, band 5.0 %)
+SLOWER: numedalslagen features clip: clean-up 5.94 -> 6.31 s (+6.3 %, band 5.0 %)
+SLOWER: lagan total 14.54 -> 15.49 s (+6.5 %, band 5.0 %)
+SLOWER: lagan features read 0.92 -> 1.10 s (+19.8 %, band 5.5 %)
+SLOWER: lagan features clip 6.34 -> 6.69 s (+5.5 %, band 5.0 %)
+SLOWER: lagan features clip: clean-up 5.39 -> 5.68 s (+5.4 %, band 5.0 %)
+SLOWER: romsdal-slope total 3.58 -> 3.92 s (+9.5 %, band 5.0 %)
+SLOWER: romsdal-slope refine 2.01 -> 2.24 s (+11.3 %, band 5.0 %)
+SLOWER: romsdal-slope refine: scan (parallel) 0.56 -> 0.63 s (+11.5 %, band 5.0 %)
+SLOWER: romsdal-slope refine: split + flip (serial) 1.18 -> 1.33 s (+12.5 %, band 5.0 %)
+HOTSPOT: tile refine 44 % of the run (not in hotspots.toml)
+HOTSPOT: tile t=1 refine 68 % of the run (not in hotspots.toml)
+HOTSPOT: tile t=1 refine: scan (parallel) 50 % of the run (not in hotspots.toml)
+HOTSPOT: quarter refine 46 % of the run (not in hotspots.toml)
+HOTSPOT: numedalslagen features clip: clean-up 67 % of the run (not in hotspots.toml)
+HOTSPOT: geilo-al-ramp decode 43 % of the run (not in hotspots.toml)
+HOTSPOT: romsdal-slope refine 57 % of the run (not in hotspots.toml)
+SLOWER
+exit 1
+## pmset after
+Now drawing from 'AC Power'
+ -InternalBattery-0 (id=24117347)	100%; charged; 0:00 remaining present: true
diff --git a/docs/benchmarks/2026-10-12/baseline-refresh/quick-run-2-save.log b/docs/benchmarks/2026-10-12/baseline-refresh/quick-run-2-save.log
new file mode 100644
index 00000000..d347f1df
--- /dev/null
+++ b/docs/benchmarks/2026-10-12/baseline-refresh/quick-run-2-save.log
@@ -0,0 +1,37 @@
+# run 2 (--save-baseline), 2026-10-12 15:30:37 +0200
+## pmset before
+Now drawing from 'AC Power'
+ -InternalBattery-0 (id=24117347)	100%; charged; 0:00 remaining present: true
+## uptime
+15:30  up 13 days,  4:36, 4 users, load averages: 3.02 3.43 4.32
+SLOWER: tile t=1 total 0.70 -> 0.79 s (+12.8 %, band 5.0 %)
+SLOWER: tile t=1 refine 0.47 -> 0.54 s (+15.5 %, band 5.0 %)
+SLOWER: tile t=1 refine: scan (parallel) 0.35 -> 0.40 s (+14.3 %, band 5.0 %)
+SLOWER: numedalslagen total 8.83 -> 9.34 s (+5.8 %, band 5.0 %)
+SLOWER: numedalslagen decode 0.92 -> 0.99 s (+7.1 %, band 5.0 %)
+SLOWER: numedalslagen features clip 6.00 -> 6.34 s (+5.7 %, band 5.0 %)
+SLOWER: numedalslagen features clip: clean-up 5.94 -> 6.28 s (+5.7 %, band 5.0 %)
+SLOWER: numedalslagen refine 0.66 -> 0.72 s (+9.1 %, band 5.0 %)
+SLOWER: lagan total 14.54 -> 15.48 s (+6.5 %, band 5.0 %)
+SLOWER: lagan features read 0.92 -> 1.09 s (+18.7 %, band 5.5 %)
+SLOWER: lagan features clip 6.34 -> 6.74 s (+6.2 %, band 5.0 %)
+SLOWER: lagan features clip: clean-up 5.39 -> 5.73 s (+6.2 %, band 5.0 %)
+SLOWER: romsdal-slope total 3.58 -> 3.88 s (+8.3 %, band 5.0 %)
+SLOWER: romsdal-slope refine 2.01 -> 2.24 s (+11.4 %, band 5.0 %)
+SLOWER: romsdal-slope refine: scan (parallel) 0.56 -> 0.63 s (+10.9 %, band 5.0 %)
+SLOWER: romsdal-slope refine: split + flip (serial) 1.18 -> 1.34 s (+12.9 %, band 5.0 %)
+HOTSPOT: tile refine 44 % of the run (not in hotspots.toml)
+HOTSPOT: tile t=1 refine 69 % of the run (not in hotspots.toml)
+HOTSPOT: tile t=1 refine: scan (parallel) 51 % of the run (not in hotspots.toml)
+HOTSPOT: quarter refine 47 % of the run (not in hotspots.toml)
+HOTSPOT: numedalslagen features clip: clean-up 67 % of the run (not in hotspots.toml)
+HOTSPOT: geilo-al-ramp decode 44 % of the run (not in hotspots.toml)
+HOTSPOT: romsdal-slope refine 58 % of the run (not in hotspots.toml)
+baseline saved: /Users/skavhaug/projects/rasputin/.claude/worktrees/baseline-1012/docs/benchmarks/quick/baseline-ac.json
+SLOWER
+exit 1
+## pmset after
+Now drawing from 'AC Power'
+ -InternalBattery-0 (id=24117347)	100%; charged; 0:00 remaining present: true
+## uptime after
+15:32  up 13 days,  4:39, 4 users, load averages: 4.51 3.69 4.27
diff --git a/docs/benchmarks/2026-10-12/baseline-refresh/quick-run-3-idle-save.log b/docs/benchmarks/2026-10-12/baseline-refresh/quick-run-3-idle-save.log
new file mode 100644
index 00000000..6da64fd7
--- /dev/null
+++ b/docs/benchmarks/2026-10-12/baseline-refresh/quick-run-3-idle-save.log
@@ -0,0 +1,51 @@
+# run 3 (wait for load < 1.5, then --save-baseline), started 2026-10-12 15:34:34 +0200
+15:34:34 load1 2.58
+15:35:04 load1 2.38
+15:35:34 load1 3.10
+15:36:04 load1 2.91
+15:36:34 load1 2.30
+15:37:04 load1 2.74
+15:37:34 load1 2.21
+15:38:04 load1 2.49
+15:38:46 load1 2.45
+15:40:01 load1 2.51
+16:00:17 load1 3.89
+16:00:47 load1 3.72
+16:01:17 load1 3.61
+16:01:47 load1 2.92
+16:02:17 load1 3.51
+16:02:47 load1 3.50
+16:03:17 load1 2.76
+16:03:48 load1 2.37
+16:04:18 load1 2.28
+16:04:48 load1 3.02
+16:05:18 load1 2.93
+16:05:48 load1 2.38
+16:06:18 load1 1.90
+16:06:48 load1 1.87
+16:07:18 load1 1.94
+16:07:48 load1 1.87
+16:08:18 load1 1.71
+16:08:48 load1 2.13
+16:09:18 load1 1.89
+16:09:48 load1 2.10
+16:10:18 load1 1.81
+16:10:48 load1 1.50
+16:11:18 load1 2.44
+16:11:49 load1 2.29
+16:12:19 load1 2.05
+16:12:49 load1 1.86
+16:13:19 load1 1.76
+16:13:49 load1 1.84
+16:14:19 load1 1.97
+16:14:49 load1 1.90
+16:15:19 load1 2.26
+16:15:49 load1 3.75
+16:16:19 load1 3.75
+16:16:49 load1 3.64
+16:17:19 load1 3.58
+16:17:49 load1 2.68
+16:18:19 load1 3.60
+16:18:49 load1 4.61
+16:19:19 load1 5.11
+GAVE UP: the load never fell under 1.5 on two samples before 16:19:49
diff --git a/docs/benchmarks/2026-10-12/baseline-refresh/quick-run-4-idle-save.log b/docs/benchmarks/2026-10-12/baseline-refresh/quick-run-4-idle-save.log
new file mode 100644
index 00000000..77c4aed9
--- /dev/null
+++ b/docs/benchmarks/2026-10-12/baseline-refresh/quick-run-4-idle-save.log
@@ -0,0 +1,58 @@
+# run 4 (wait for load < 2.0 twice, then --save-baseline), started 2026-10-12 20:15:03 +0200
+20:15:03 load1 2.06
+20:15:34 load1 2.09
+20:16:04 load1 2.94
+20:16:34 load1 3.32
+20:17:04 load1 3.31
+20:17:34 load1 2.81
+20:18:04 load1 2.97
+20:18:34 load1 3.03
+20:19:04 load1 2.47
+20:19:34 load1 2.03
+20:20:04 load1 2.74
+20:20:34 load1 2.34
+20:21:04 load1 2.04
+20:21:34 load1 2.09
+20:22:04 load1 2.56
+20:22:34 load1 2.50
+20:23:04 load1 2.50
+20:23:34 load1 2.73
+20:24:04 load1 3.04
+20:24:34 load1 2.63
+20:25:04 load1 2.25
+20:25:34 load1 2.10
+20:26:04 load1 2.43
+20:26:34 load1 2.65
+20:27:05 load1 3.37
+20:27:35 load1 3.04
+20:28:05 load1 2.91
+20:28:35 load1 2.51
+20:29:05 load1 1.96
+20:29:35 load1 1.76
+## pmset before
+Now drawing from 'AC Power'
+ -InternalBattery-0 (id=24117347)	100%; charged; 0:00 remaining present: true
+## uptime
+20:29  up 13 days,  9:35, 5 users, load averages: 1.76 2.49 5.13
+## top CPU users
+ 75.2 /Applications/iTerm.app/Contents/XPCServices/pidinfo.xpc/Contents/MacOS/pidinfo
+ 16.2 /Applications/iTerm.app/Contents/MacOS/iTerm2
+  5.1 /System/Library/Frameworks/WebKit.framework/Versions/A/XPCServices/com.apple.WebKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent
+  3.8 /System/Volumes/Preboot/Cryptexes/App/System/Applications/Safari.app/Contents/MacOS/Safari
+  3.7 /Applications/Xerox/Xerox Workplace Cloud Client.app/Contents/MacOS/Xerox Workplace Cloud Client
+  1.7 /System/Library/CoreServices/Finder.app/Contents/MacOS/Finder
+HOTSPOT: tile refine 45 % of the run (not in hotspots.toml)
+HOTSPOT: tile t=1 refine 66 % of the run (not in hotspots.toml)
+HOTSPOT: tile t=1 refine: scan (parallel) 50 % of the run (not in hotspots.toml)
+HOTSPOT: quarter refine 47 % of the run (not in hotspots.toml)
+HOTSPOT: numedalslagen features clip: clean-up 67 % of the run (not in hotspots.toml)
+HOTSPOT: geilo-al-ramp decode 43 % of the run (not in hotspots.toml)
+HOTSPOT: romsdal-slope refine 55 % of the run (not in hotspots.toml)
+baseline saved: /Users/skavhaug/projects/rasputin/.claude/worktrees/baseline-1012/docs/benchmarks/quick/baseline-ac.json
+NO BASELINE: input $RASPUTIN_DATA/sweden_glo30_cache changed
+exit 2
+## pmset after
+Now drawing from 'AC Power'
+ -InternalBattery-0 (id=24117347)	100%; charged; 0:00 remaining present: true
+## uptime after
+20:31  up 13 days,  9:37, 5 users, load averages: 4.98 3.19 5.02
diff --git a/docs/benchmarks/2026-10-12/baseline-refresh/quick-run-5-increment-38.log b/docs/benchmarks/2026-10-12/baseline-refresh/quick-run-5-increment-38.log
new file mode 100644
index 00000000..42e5463d
--- /dev/null
+++ b/docs/benchmarks/2026-10-12/baseline-refresh/quick-run-5-increment-38.log
@@ -0,0 +1,29 @@
+# run 5 (increment 38, --tree /Users/skavhaug/projects/rasputin/.claude/worktrees/threads, judged against the baseline run 4 saved), started 2026-10-12 20:31:45 +0200
+## tree 38 head
+8f9289c49f69b95e6e9207a3b2f80ab2467d3351
+## pmset before
+Now drawing from 'AC Power'
+ -InternalBattery-0 (id=24117347)	100%; charged; 0:00 remaining present: true
+## uptime
+20:31  up 13 days,  9:37, 5 users, load averages: 4.98 3.19 5.02
+## top CPU users
+ 75.6 /Applications/iTerm.app/Contents/XPCServices/pidinfo.xpc/Contents/MacOS/pidinfo
+ 11.0 /Applications/iTerm.app/Contents/MacOS/iTerm2
+  3.5 /usr/libexec/airportd
+  3.4 /Applications/Xerox/Xerox Workplace Cloud Client.app/Contents/MacOS/Xerox Workplace Cloud Client
+  3.0 /System/Library/Frameworks/WebKit.framework/Versions/A/XPCServices/com.apple.WebKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent
+  2.8 /System/Volumes/Preboot/Cryptexes/App/System/Applications/Safari.app/Contents/MacOS/Safari
+HOTSPOT: tile refine 45 % of the run (not in hotspots.toml)
+HOTSPOT: tile t=1 refine 67 % of the run (not in hotspots.toml)
+HOTSPOT: tile t=1 refine: scan (parallel) 50 % of the run (not in hotspots.toml)
+HOTSPOT: quarter refine 47 % of the run (not in hotspots.toml)
+HOTSPOT: numedalslagen features clip: clean-up 67 % of the run (not in hotspots.toml)
+HOTSPOT: geilo-al-ramp decode 43 % of the run (not in hotspots.toml)
+HOTSPOT: romsdal-slope refine 56 % of the run (not in hotspots.toml)
+NO CHANGE
+exit 0
+## pmset after
+Now drawing from 'AC Power'
+ -InternalBattery-0 (id=24117347)	100%; charged; 0:00 remaining present: true
+## uptime after
+20:34  up 13 days,  9:40, 5 users, load averages: 3.57 3.24 4.73
diff --git a/docs/benchmarks/2026-10-12/baseline-refresh/raw/delta-old-357808b1-vs-new-969c49e2.md b/docs/benchmarks/2026-10-12/baseline-refresh/raw/delta-old-357808b1-vs-new-969c49e2.md
new file mode 100644
index 00000000..86ddfcc0
--- /dev/null
+++ b/docs/benchmarks/2026-10-12/baseline-refresh/raw/delta-old-357808b1-vs-new-969c49e2.md
@@ -0,0 +1,58 @@
+# Stored baseline `357808b1` (2026-10-11) vs the refreshed baseline `969c49e2` (run 4, 2026-10-12 20:29, idle, AC)
+
+Every phase at 5 % or more of its case's total, as `bench_quick.verdict`
+selects them; band = max(5 %, the old record's (max - min) / median). The
+tool itself printed `NO BASELINE: input $RASPUTIN_DATA/sweden_glo30_cache
+changed` (the Lagan GLO-30 cache gained tiles), so this table was made by
+calling `verdict` on the two records with the old inputs substituted into
+the new one (`.venv/bin/python`, `tools/bench_quick.py` at `969c49e2`); the
+judge lines it gives are:
+
+    SLOWER: lagan features read 0.92 -> 1.03 s (+12.1 %, band 5.5 %)
+
+No `MESH CHANGED`, no `BROKEN`; every case's mesh SHA-256 and `max_error`
+equal the stored ones.
+
+| line | old s | new s | change | band |
+|---|---:|---:|---:|---:|
+| tile total | 0.416 | 0.430 | +3.3 % | 5.0 % |
+| tile decode | 0.060 | 0.070 | +15.8 % | 5.5 % |
+| tile start mesh: triangulate | 0.029 | 0.029 | -0.1 % | 5.0 % |
+| tile refine | 0.190 | 0.192 | +1.2 % | 5.0 % |
+| tile refine: scan (parallel) | 0.056 | 0.057 | +1.5 % | 5.0 % |
+| tile refine: split + flip (serial) | 0.106 | 0.108 | +1.3 % | 6.2 % |
+| tile refine: setup + output | 0.025 | 0.026 | +4.0 % | 5.0 % |
+| tile t=1 total | 0.699 | 0.711 | +1.7 % | 5.0 % |
+| tile t=1 decode | 0.060 | 0.068 | +13.3 % | 5.8 % |
+| tile t=1 refine | 0.472 | 0.473 | +0.2 % | 5.0 % |
+| tile t=1 refine: scan (parallel) | 0.352 | 0.352 | +0.1 % | 5.0 % |
+| tile t=1 refine: split + flip (serial) | 0.094 | 0.094 | -0.1 % | 5.0 % |
+| quarter total | 0.355 | 0.366 | +3.1 % | 5.0 % |
+| quarter decode | 0.044 | 0.051 | +15.9 % | 5.7 % |
+| quarter refine | 0.172 | 0.171 | -0.4 % | 5.6 % |
+| quarter refine: scan (parallel) | 0.045 | 0.046 | +1.2 % | 5.0 % |
+| quarter refine: split + flip (serial) | 0.107 | 0.106 | -1.4 % | 7.8 % |
+| numedalslagen total | 8.829 | 8.894 | +0.7 % | 5.0 % |
+| numedalslagen decode | 0.921 | 0.950 | +3.2 % | 5.0 % |
+| numedalslagen features clip | 6.000 | 6.022 | +0.4 % | 5.0 % |
+| numedalslagen features clip: clean-up | 5.937 | 5.956 | +0.3 % | 5.0 % |
+| numedalslagen refine | 0.659 | 0.661 | +0.4 % | 5.0 % |
+| lagan total | 14.542 | 14.736 | +1.3 % | 5.0 % |
+| lagan decode | 4.578 | 4.615 | +0.8 % | 5.0 % |
+| lagan features read | 0.922 | 1.033 | +12.1 % | 5.5 % |
+| lagan features clip | 6.342 | 6.353 | +0.2 % | 5.0 % |
+| lagan features clip: clean-up | 5.392 | 5.397 | +0.1 % | 5.0 % |
+| geilo-al-ramp total | 0.329 | 0.344 | +4.7 % | 5.0 % |
+| geilo-al-ramp decode | 0.138 | 0.148 | +7.2 % | 5.0 % |
+| geilo-al-ramp refine | 0.099 | 0.101 | +1.5 % | 5.0 % |
+| geilo-al-ramp refine: scan (parallel) | 0.083 | 0.083 | +1.0 % | 5.0 % |
+| romsdal-slope total | 3.578 | 3.624 | +1.3 % | 5.0 % |
+| romsdal-slope refine | 2.009 | 2.010 | +0.1 % | 5.0 % |
+| romsdal-slope refine: scan (parallel) | 0.564 | 0.567 | +0.6 % | 5.0 % |
+| romsdal-slope refine: split + flip (serial) | 1.184 | 1.183 | -0.1 % | 5.0 % |
+| romsdal-slope refine: setup + output | 0.257 | 0.262 | +2.1 % | 5.0 % |
+
+The small `decode` phases (tile, tile t=1, quarter, geilo-al-ramp: +7 to
++16 %) are over their percentage band but under the tool's 0.05 s floor
+(0.007 to 0.010 s each), so the tool does not flag them; `lagan decode`,
+the one large decode, is +0.8 %.
diff --git a/docs/benchmarks/2026-10-12/baseline-refresh/raw/delta-stored-vs-loaded-1530.md b/docs/benchmarks/2026-10-12/baseline-refresh/raw/delta-stored-vs-loaded-1530.md
new file mode 100644
index 00000000..b286a983
--- /dev/null
+++ b/docs/benchmarks/2026-10-12/baseline-refresh/raw/delta-stored-vs-loaded-1530.md
@@ -0,0 +1,40 @@
+stored baseline commit 357808b1 vs run 2 (15:30, loaded machine) commit c317c7e4; medians of the timed runs, seconds
+
+| case | phase | stored | run 2 | change | mesh same |
+|---|---|---:|---:|---:|---|
+| tile | total | 0.416 | 0.453 | +8.9 % | yes |
+| tile | decode | 0.060 | 0.067 | +12.1 % |  |
+| tile | start mesh: triangulate | 0.029 | 0.030 | +2.5 % |  |
+| tile | refine | 0.190 | 0.201 | +5.9 % |  |
+| tile | refine: scan (parallel) | 0.056 | 0.061 | +8.0 % |  |
+| tile | refine: split + flip (serial) | 0.106 | 0.113 | +6.3 % |  |
+| tile | refine: setup + output | 0.025 | 0.027 | +6.4 % |  |
+| tile t=1 | total | 0.699 | 0.789 | +12.8 % | yes |
+| tile t=1 | decode | 0.060 | 0.068 | +13.3 % |  |
+| tile t=1 | refine | 0.472 | 0.545 | +15.5 % |  |
+| tile t=1 | refine: scan (parallel) | 0.352 | 0.402 | +14.3 % |  |
+| tile t=1 | refine: split + flip (serial) | 0.094 | 0.113 | +20.5 % |  |
+| quarter | total | 0.355 | 0.388 | +9.3 % | yes |
+| quarter | decode | 0.044 | 0.053 | +20.1 % |  |
+| quarter | refine | 0.172 | 0.181 | +5.4 % |  |
+| quarter | refine: scan (parallel) | 0.045 | 0.050 | +9.9 % |  |
+| quarter | refine: split + flip (serial) | 0.107 | 0.112 | +4.1 % |  |
+| numedalslagen | total | 8.829 | 9.343 | +5.8 % | yes |
+| numedalslagen | decode | 0.921 | 0.986 | +7.1 % |  |
+| numedalslagen | features clip | 6.000 | 6.342 | +5.7 % |  |
+| numedalslagen | features clip: clean-up | 5.937 | 6.275 | +5.7 % |  |
+| numedalslagen | refine | 0.659 | 0.719 | +9.1 % |  |
+| lagan | total | 14.542 | 15.483 | +6.5 % | yes |
+| lagan | decode | 4.578 | 4.783 | +4.5 % |  |
+| lagan | features read | 0.922 | 1.094 | +18.7 % |  |
+| lagan | features clip | 6.342 | 6.737 | +6.2 % |  |
+| lagan | features clip: clean-up | 5.392 | 5.726 | +6.2 % |  |
+| geilo-al-ramp | total | 0.329 | 0.364 | +10.9 % | yes |
+| geilo-al-ramp | decode | 0.138 | 0.159 | +15.0 % |  |
+| geilo-al-ramp | refine | 0.099 | 0.107 | +7.9 % |  |
+| geilo-al-ramp | refine: scan (parallel) | 0.083 | 0.089 | +7.3 % |  |
+| romsdal-slope | total | 3.578 | 3.876 | +8.3 % | yes |
+| romsdal-slope | refine | 2.009 | 2.238 | +11.4 % |  |
+| romsdal-slope | refine: scan (parallel) | 0.564 | 0.625 | +10.9 % |  |
+| romsdal-slope | refine: split + flip (serial) | 1.184 | 1.337 | +12.9 % |  |
+| romsdal-slope | refine: setup + output | 0.257 | 0.276 | +7.5 % |  |
diff --git a/docs/benchmarks/2026-10-12/baseline-refresh/raw/evening_idle_save_then_38.sh b/docs/benchmarks/2026-10-12/baseline-refresh/raw/evening_idle_save_then_38.sh
new file mode 100644
index 00000000..e8ae17a8
--- /dev/null
+++ b/docs/benchmarks/2026-10-12/baseline-refresh/raw/evening_idle_save_then_38.sh
@@ -0,0 +1,39 @@
+#!/bin/zsh
+# Evening, 2026-10-12. Wait until the 1-minute load average is under 2.0 on
+# two samples 30 s apart (at most 30 minutes), then:
+#   run 4: the quick check on this tree (master f09b9863 merged in) with
+#          --save-baseline, judged against the stored 357808b1 baseline;
+#   run 5: increment 38's tree (worktrees/threads) judged against the
+#          baseline run 4 just saved. Nothing else of ours runs beside them.
+set -u
+TREE=/Users/skavhaug/projects/rasputin/.claude/worktrees/baseline-1012
+TREE38=/Users/skavhaug/projects/rasputin/.claude/worktrees/threads
+DIR=$TREE/docs/benchmarks/2026-10-12/baseline-refresh
+LOG4=$DIR/quick-run-4-idle-save.log
+LOG5=$DIR/quick-run-5-increment-38.log
+cd "$TREE" || exit 3
+deadline=$(( $(date +%s) + 30 * 60 ))
+low=0
+echo "# run 4 (wait for load < 2.0 twice, then --save-baseline), started $(date '+%Y-%m-%d %H:%M:%S %z')" > "$LOG4"
+while [ "$(date +%s)" -lt "$deadline" ]; do
+  load=$(sysctl -n vm.loadavg | awk '{print $2}')
+  echo "$(date +%H:%M:%S) load1 $load" >> "$LOG4"
+  if [ "$(echo "$load < 2.0" | bc)" = 1 ]; then low=$((low + 1)); else low=0; fi
+  if [ "$low" -ge 2 ]; then
+    { echo "## pmset before"; pmset -g batt; echo "## uptime"; uptime;
+      echo "## top CPU users"; ps -eo pcpu,comm | sort -rn | head -6; } >> "$LOG4"
+    RASPUTIN_DATA=/Users/skavhaug/projects/rasputin_data .venv/bin/python tools/bench_quick.py run --save-baseline >> "$LOG4" 2>&1
+    echo "exit $?" >> "$LOG4"
+    { echo "## pmset after"; pmset -g batt; echo "## uptime after"; uptime; } >> "$LOG4"
+    echo "# run 5 (increment 38, --tree $TREE38, judged against the baseline run 4 saved), started $(date '+%Y-%m-%d %H:%M:%S %z')" > "$LOG5"
+    { echo "## tree 38 head"; git -C "$TREE38" rev-parse HEAD; echo "## pmset before"; pmset -g batt; echo "## uptime"; uptime;
+      echo "## top CPU users"; ps -eo pcpu,comm | sort -rn | head -6; } >> "$LOG5"
+    RASPUTIN_DATA=/Users/skavhaug/projects/rasputin_data .venv/bin/python tools/bench_quick.py run --tree "$TREE38" >> "$LOG5" 2>&1
+    echo "exit $?" >> "$LOG5"
+    { echo "## pmset after"; pmset -g batt; echo "## uptime after"; uptime; } >> "$LOG5"
+    exit 0
+  fi
+  sleep 30
+done
+echo "GAVE UP: the load never fell under 2.0 on two samples before $(date '+%H:%M:%S')" >> "$LOG4"
+exit 4
diff --git a/docs/benchmarks/2026-10-12/baseline-refresh/raw/lagan-plain-runs.jsonl b/docs/benchmarks/2026-10-12/baseline-refresh/raw/lagan-plain-runs.jsonl
new file mode 100644
index 00000000..b79f6e4a
--- /dev/null
+++ b/docs/benchmarks/2026-10-12/baseline-refresh/raw/lagan-plain-runs.jsonl
@@ -0,0 +1,6 @@
+{"tree":"old","run":1,"bench": {"refine_s": 0.254810166079551, "app_s": 15.5025962080108, "max_error": 9.999904677002576, "rounds": 18, "inserted": 89957, "flips": 228288, "hardening": "libc++ fast", "total_s": 15.49061125, "phases": {"domain read": 0.047272959, "decode": 4.772437958, "features read": 1.1070569030707702, "features clip": 6.730989263858646, "features clip: clean-up": 5.744550041970797, "start mesh: build": 0.00361925, "start mesh: node": 0.32073675, "start mesh: triangulate": 0.091020042, "start mesh: constraint edges": 0.2261185, "refine": 0.254842333, "refine: legalise start": 0.004466833, "refine: start quality": 0.06998875, "refine: scan (parallel)": 0.062432707999999996, "refine: split + flip (serial)": 0.05908304100000001, "refine: setup + output": 0.05887100099999998, "edge strip: generate": 0.04405875, "check points: project": 0.6820140873314813, "check points: store": 0.28006945468621386, "final check: scan (parallel)": 0.297217, "final check: split + flip (serial)": 0.040978582, "trim": 0.019001833, "land cover": 0.211632083, "write: encode": 0.008202458, "write: disk": 0.012248209}}}
+{"tree":"new","run":1,"bench": {"refine_s": 0.26488420797977597, "app_s": 15.581828458001837, "max_error": 9.999904677002576, "rounds": 18, "inserted": 89957, "flips": 228288, "hardening": "libc++ fast", "total_s": 15.569284583, "phases": {"domain read": 0.046486042, "decode": 4.760526375, "features read": 1.1309317838167772, "features clip": 6.782271383097395, "features clip: clean-up": 5.740673583932221, "start mesh: build": 0.003332708, "start mesh: node": 0.312553875, "start mesh: triangulate": 0.091905917, "start mesh: constraint edges": 0.221933334, "refine": 0.264917583, "refine: legalise start": 0.004503083, "refine: start quality": 0.07453575, "refine: scan (parallel)": 0.06894679400000002, "refine: split + flip (serial)": 0.057723580999999996, "refine: setup + output": 0.05920837500000001, "edge strip: generate": 0.046787208, "check points: project": 0.6889762914506719, "check points: store": 0.28179145856231136, "final check: scan (parallel)": 0.2996589999999999, "final check: split + flip (serial)": 0.042011418999999994, "trim": 0.0194015, "land cover": 0.2123685, "write: encode": 0.008035625, "write: disk": 0.013050292}}}
+{"tree":"old","run":2,"bench": {"refine_s": 0.24894316704012454, "app_s": 15.28243420808576, "max_error": 9.999904677002576, "rounds": 18, "inserted": 89957, "flips": 228288, "hardening": "libc++ fast", "total_s": 15.270279917, "phases": {"domain read": 0.046708, "decode": 4.746606791, "features read": 1.1331501099048182, "features clip": 6.541201932122931, "features clip: clean-up": 5.5428702080389485, "start mesh: build": 0.003248542, "start mesh: node": 0.30889725, "start mesh: triangulate": 0.087754667, "start mesh: constraint edges": 0.201382709, "refine": 0.248979042, "refine: legalise start": 0.004337625, "refine: start quality": 0.062581834, "refine: scan (parallel)": 0.06401149699999997, "refine: split + flip (serial)": 0.060656876, "refine: setup + output": 0.057391210000000026, "edge strip: generate": 0.041843584, "check points: project": 0.7052432431373745, "check points: store": 0.2780911309445936, "final check: scan (parallel)": 0.295289791, "final check: split + flip (serial)": 0.041114207, "trim": 0.019330833, "land cover": 0.213708292, "write: encode": 0.008309875, "write: disk": 0.01162975}}}
+{"tree":"new","run":2,"bench": {"refine_s": 0.2629793749656528, "app_s": 15.553417750052176, "max_error": 9.999904677002576, "rounds": 18, "inserted": 89957, "flips": 228288, "hardening": "libc++ fast", "total_s": 15.540982208, "phases": {"domain read": 0.046765375, "decode": 4.771298709, "features read": 1.1028321152552962, "features clip": 6.762040967703797, "features clip: clean-up": 5.762504249927588, "start mesh: build": 0.003520125, "start mesh: node": 0.31292225, "start mesh: triangulate": 0.09154775, "start mesh: constraint edges": 0.223612042, "refine": 0.263016208, "refine: legalise start": 0.004418375, "refine: start quality": 0.074442917, "refine: scan (parallel)": 0.064212539, "refine: split + flip (serial)": 0.061927833999999994, "refine: setup + output": 0.058014542999999974, "edge strip: generate": 0.043500833, "check points: project": 0.6786329164169729, "check points: store": 0.28495370854598284, "final check: scan (parallel)": 0.2930762519999999, "final check: split + flip (serial)": 0.041293582, "trim": 0.020288291, "land cover": 0.243144625, "write: encode": 0.008461791, "write: disk": 0.004099292}}}
+{"tree":"old","run":3,"bench": {"refine_s": 0.2612497080117464, "app_s": 15.512547209043987, "max_error": 9.999904677002576, "rounds": 18, "inserted": 89957, "flips": 228288, "hardening": "libc++ fast", "total_s": 15.500557666, "phases": {"domain read": 0.046589667, "decode": 4.766169625, "features read": 1.0925908016506582, "features clip": 6.73266732331831, "features clip: clean-up": 5.722619750071317, "start mesh: build": 0.003307292, "start mesh: node": 0.323448916, "start mesh: triangulate": 0.091361042, "start mesh: constraint edges": 0.220533167, "refine": 0.261286125, "refine: legalise start": 0.004649834, "refine: start quality": 0.075448958, "refine: scan (parallel)": 0.06368779, "refine: split + flip (serial)": 0.059157166, "refine: setup + output": 0.058342377, "edge strip: generate": 0.045263541, "check points: project": 0.7140497468644753, "check points: store": 0.2828833371105355, "final check: scan (parallel)": 0.2948787500000001, "final check: split + flip (serial)": 0.041087750000000006, "trim": 0.019170833, "land cover": 0.211919458, "write: encode": 0.008297417, "write: disk": 0.0109515}}}
+{"tree":"new","run":3,"bench": {"refine_s": 0.262434667092748, "app_s": 15.524189541931264, "max_error": 9.999904677002576, "rounds": 18, "inserted": 89957, "flips": 228288, "hardening": "libc++ fast", "total_s": 15.511099959, "phases": {"domain read": 0.047049, "decode": 4.782878208, "features read": 1.1019477323861793, "features clip": 6.760739725665189, "features clip: clean-up": 5.750452209031209, "start mesh: build": 0.003593916, "start mesh: node": 0.311633334, "start mesh: triangulate": 0.091970334, "start mesh: constraint edges": 0.221218375, "refine": 0.262469958, "refine: legalise start": 0.004386, "refine: start quality": 0.075812417, "refine: scan (parallel)": 0.06291353999999999, "refine: split + flip (serial)": 0.061582373, "refine: setup + output": 0.05777562800000002, "edge strip: generate": 0.043940792, "check points: project": 0.6762596678454429, "check points: store": 0.28200558214986005, "final check: scan (parallel)": 0.291785293, "final check: split + flip (serial)": 0.041089041999999985, "trim": 0.019313459, "land cover": 0.212601667, "write: encode": 0.008313542, "write: disk": 0.004433459}}}
diff --git a/docs/benchmarks/2026-10-12/baseline-refresh/raw/lagan-profile-read-path.txt b/docs/benchmarks/2026-10-12/baseline-refresh/raw/lagan-profile-read-path.txt
new file mode 100644
index 00000000..bb0b2640
--- /dev/null
+++ b/docs/benchmarks/2026-10-12/baseline-refresh/raw/lagan-profile-read-path.txt
@@ -0,0 +1,190 @@
+Lagan case under cProfile, two runs per tree, alternating old/new (2026-10-12 15:25-15:27 local, AC).
+old = 357808b1 (the stored baseline's commit, .so sha256 51872f0a...), new = c317c7e4 (master, .so 55bb3993...).
+Meshes of all four runs: sha256 6c110f9eb1fb6a741bd4a19a954a91b7a7424d43f7ba04c354d25f9a42495fa0.
+
+
+######## old-1: profiled total 16.63 s; read-path functions by cumulative time
+Mon Oct 12 15:25:49 2026    /private/tmp/claude-501/-Users-skavhaug-projects-rasputin/6a989a29-4492-430f-99b0-9fe3058f931a/scratchpad/lagan-old-1.prof
+
+         4459643 function calls (4450810 primitive calls) in 16.630 seconds
+
+   Random listing order was used
+   List reduced from 1522 to 94 due to restriction <'feature_input|geopackage|repository|crs\\.py|land_cover\\.py'>
+   List reduced from 94 to 20 due to restriction <20>
+
+   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
+   175/60    0.003    0.000    0.457    0.008 crs.py:224(_transformer)
+   111/34    0.003    0.000    0.319    0.009 crs.py:50(reprojector)
+        2    0.000    0.000    0.005    0.003 crs.py:86(transform_description)
+        2    0.000    0.000    0.007    0.004 crs.py:135(transform_label)
+        8    0.000    0.000    0.018    0.002 crs.py:96(same_crs)
+        3    0.000    0.000    0.000    0.000 crs.py:152(crs_label)
+      363    0.000    0.000    0.156    0.000 crs.py:40(parse_crs)
+        1    0.000    0.000    0.000    0.000 crs.py:140(single_crs)
+       60    0.000    0.000    0.000    0.000 crs.py:352(_crs)
+      108    0.000    0.000    0.001    0.000 repository.py:189(_path)
+      346    0.000    0.000    0.001    0.000 crs.py:155(_is_epsg_code)
+        8    0.001    0.000    0.001    0.000 crs.py:961(equals)
+        8    0.000    0.000    0.018    0.002 crs.py:124(_equivalent_xy)
+      362    0.001    0.000    0.001    0.000 crs.py:62(__init__)
+       10    0.000    0.000    0.001    0.000 crs.py:381(from_epsg)
+       10    0.000    0.000    0.000    0.000 crs.py:151(_prepare_from_epsg)
+        1    0.000    0.000    0.000    0.000 crs.py:505(get_geod)
+        1    0.000    0.000    0.000    0.000 crs.py:458(to_string)
+       10    0.000    0.000    0.000    0.000 crs.py:147(_prepare_from_authority)
+      704    0.001    0.000    0.156    0.000 crs.py:477(from_user_input)
+
+
+
+######## new-1: profiled total 16.53 s; read-path functions by cumulative time
+Mon Oct 12 15:26:05 2026    /private/tmp/claude-501/-Users-skavhaug-projects-rasputin/6a989a29-4492-430f-99b0-9fe3058f931a/scratchpad/lagan-new-1.prof
+
+         4460981 function calls (4451978 primitive calls) in 16.535 seconds
+
+   Random listing order was used
+   List reduced from 1527 to 94 due to restriction <'feature_input|geopackage|repository|crs\\.py|land_cover\\.py'>
+   List reduced from 94 to 20 due to restriction <20>
+
+   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
+   111/35    0.003    0.000    0.344    0.010 crs.py:52(reprojector)
+        8    0.000    0.000    0.018    0.002 crs.py:98(same_crs)
+        3    0.000    0.000    0.000    0.000 crs.py:154(crs_label)
+        2    0.000    0.000    0.005    0.002 crs.py:88(transform_description)
+        2    0.000    0.000    0.006    0.003 crs.py:137(transform_label)
+      342    0.000    0.000    0.001    0.000 crs.py:155(_is_epsg_code)
+      359    0.000    0.000    0.162    0.000 crs.py:42(parse_crs)
+        1    0.000    0.000    0.000    0.000 crs.py:142(single_crs)
+       60    0.000    0.000    0.000    0.000 crs.py:352(_crs)
+        8    0.001    0.000    0.001    0.000 crs.py:961(equals)
+   173/61    0.003    0.000    0.733    0.012 crs.py:251(_transformer)
+        8    0.000    0.000    0.018    0.002 crs.py:126(_equivalent_xy)
+      358    0.001    0.000    0.001    0.000 crs.py:62(__init__)
+       10    0.000    0.000    0.000    0.000 crs.py:151(_prepare_from_epsg)
+        1    0.000    0.000    0.000    0.000 crs.py:505(get_geod)
+        1    0.000    0.000    0.000    0.000 crs.py:458(to_string)
+       10    0.000    0.000    0.000    0.000 crs.py:147(_prepare_from_authority)
+       10    0.000    0.000    0.001    0.000 crs.py:381(from_epsg)
+      696    0.001    0.000    0.162    0.000 crs.py:477(from_user_input)
+        4    0.000    0.000    0.000    0.000 crs.py:1300(to_epsg)
+
+
+
+######## old-2: profiled total 16.59 s; read-path functions by cumulative time
+Mon Oct 12 15:26:22 2026    /private/tmp/claude-501/-Users-skavhaug-projects-rasputin/6a989a29-4492-430f-99b0-9fe3058f931a/scratchpad/lagan-old-2.prof
+
+         4460489 function calls (4451308 primitive calls) in 16.590 seconds
+
+   Random listing order was used
+   List reduced from 1522 to 94 due to restriction <'feature_input|geopackage|repository|crs\\.py|land_cover\\.py'>
+   List reduced from 94 to 20 due to restriction <20>
+
+   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
+   182/63    0.002    0.000    0.594    0.009 crs.py:224(_transformer)
+   111/37    0.003    0.000    0.441    0.012 crs.py:50(reprojector)
+        2    0.000    0.000    0.005    0.002 crs.py:86(transform_description)
+        2    0.000    0.000    0.006    0.003 crs.py:135(transform_label)
+        8    0.000    0.000    0.017    0.002 crs.py:96(same_crs)
+        3    0.000    0.000    0.000    0.000 crs.py:152(crs_label)
+  377/375    0.000    0.000    0.180    0.000 crs.py:40(parse_crs)
+        1    0.000    0.000    0.000    0.000 crs.py:140(single_crs)
+       60    0.000    0.000    0.000    0.000 crs.py:352(_crs)
+      108    0.000    0.000    0.001    0.000 repository.py:189(_path)
+      360    0.000    0.000    0.001    0.000 crs.py:155(_is_epsg_code)
+        8    0.001    0.000    0.001    0.000 crs.py:961(equals)
+        8    0.000    0.000    0.017    0.002 crs.py:124(_equivalent_xy)
+      376    0.001    0.000    0.001    0.000 crs.py:62(__init__)
+       10    0.000    0.000    0.001    0.000 crs.py:381(from_epsg)
+       10    0.000    0.000    0.000    0.000 crs.py:151(_prepare_from_epsg)
+        1    0.000    0.000    0.000    0.000 crs.py:505(get_geod)
+        1    0.000    0.000    0.000    0.000 crs.py:458(to_string)
+       10    0.000    0.000    0.000    0.000 crs.py:147(_prepare_from_authority)
+  732/728    0.001    0.000    0.179    0.000 crs.py:477(from_user_input)
+
+
+
+######## new-2: profiled total 16.52 s; read-path functions by cumulative time
+Mon Oct 12 15:26:39 2026    /private/tmp/claude-501/-Users-skavhaug-projects-rasputin/6a989a29-4492-430f-99b0-9fe3058f931a/scratchpad/lagan-new-2.prof
+
+         4462069 function calls (4452848 primitive calls) in 16.520 seconds
+
+   Random listing order was used
+   List reduced from 1527 to 94 due to restriction <'feature_input|geopackage|repository|crs\\.py|land_cover\\.py'>
+   List reduced from 94 to 20 due to restriction <20>
+
+   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
+   111/33    0.003    0.000    0.431    0.013 crs.py:52(reprojector)
+        8    0.000    0.000    0.018    0.002 crs.py:98(same_crs)
+        3    0.000    0.000    0.000    0.000 crs.py:154(crs_label)
+        2    0.000    0.000    0.005    0.003 crs.py:88(transform_description)
+        2    0.000    0.000    0.007    0.003 crs.py:137(transform_label)
+      356    0.000    0.000    0.001    0.000 crs.py:155(_is_epsg_code)
+      373    0.000    0.000    0.182    0.000 crs.py:42(parse_crs)
+        1    0.000    0.000    0.000    0.000 crs.py:142(single_crs)
+       60    0.000    0.000    0.000    0.000 crs.py:352(_crs)
+        8    0.001    0.000    0.001    0.000 crs.py:961(equals)
+   180/58    0.006    0.000    0.749    0.013 crs.py:251(_transformer)
+        8    0.000    0.000    0.018    0.002 crs.py:126(_equivalent_xy)
+      372    0.001    0.000    0.001    0.000 crs.py:62(__init__)
+       10    0.000    0.000    0.000    0.000 crs.py:151(_prepare_from_epsg)
+        1    0.000    0.000    0.000    0.000 crs.py:505(get_geod)
+        1    0.000    0.000    0.000    0.000 crs.py:458(to_string)
+       10    0.000    0.000    0.000    0.000 crs.py:147(_prepare_from_authority)
+       10    0.000    0.000    0.001    0.000 crs.py:381(from_epsg)
+      724    0.001    0.000    0.183    0.000 crs.py:477(from_user_input)
+        4    0.000    0.000    0.000    0.000 crs.py:1300(to_epsg)
+
+
+
+######## old-1: top 15 by own time (section 7's report; shares, not times)
+Mon Oct 12 15:25:49 2026    /private/tmp/claude-501/-Users-skavhaug-projects-rasputin/6a989a29-4492-430f-99b0-9fe3058f931a/scratchpad/lagan-old-1.prof
+
+         4459643 function calls (4450810 primitive calls) in 16.630 seconds
+
+   Random listing order was used
+   List reduced from 1522 to 15 due to restriction <15>
+
+   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
+        1    0.000    0.000    0.000    0.000 {method 'disable' of '_lsprof.Profiler' objects}
+       14    0.000    0.000    0.000    0.000 <frozen importlib._bootstrap>:304(acquire)
+       10    0.000    0.000    0.001    0.000 <frozen importlib._bootstrap>:1243(_find_spec)
+      6/1    0.000    0.000    0.006    0.006 <frozen importlib._bootstrap>:1409(_handle_fromlist)
+      690    0.000    0.000    0.000    0.000 {built-in method _struct.calcsize}
+     9286    0.001    0.000    0.001    0.000 {built-in method _struct.unpack}
+        5    0.000    0.000    0.000    0.000 {method 'find' of 'bytearray' objects}
+       26    0.000    0.000    0.000    0.000 {method 'decode' of 'bytes' objects}
+       11    0.001    0.000    0.001    0.000 {method 'join' of 'bytes' objects}
+       11    0.000    0.000    0.000    0.000 {method 'rstrip' of 'bytes' objects}
+        8    0.000    0.000    0.000    0.000 {method 'startswith' of 'bytes' objects}
+       24    0.000    0.000    0.000    0.000 {method 'translate' of 'bytes' objects}
+    12318    0.001    0.000    0.001    0.000 {method 'get' of 'mappingproxy' objects}
+       84    0.000    0.000    0.000    0.000 {method 'values' of 'mappingproxy' objects}
+        1    0.000    0.000    0.000    0.000 {method 'items' of 'mappingproxy' objects}
+
+
+
+######## new-1: top 15 by own time (section 7's report; shares, not times)
+Mon Oct 12 15:26:05 2026    /private/tmp/claude-501/-Users-skavhaug-projects-rasputin/6a989a29-4492-430f-99b0-9fe3058f931a/scratchpad/lagan-new-1.prof
+
+         4460981 function calls (4451978 primitive calls) in 16.535 seconds
+
+   Random listing order was used
+   List reduced from 1527 to 15 due to restriction <15>
+
+   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
+        5    0.000    0.000    0.000    0.000 <frozen importlib._bootstrap_external>:750(create_module)
+        5    0.000    0.000    0.000    0.000 <frozen importlib._bootstrap_external>:457(_validate_timestamp_pyc)
+        1    0.000    0.000    0.000    0.000 _compiler.py:421(_generate_overlap_table)
+        1    0.000    0.000    0.000    0.000 ast.py:72(_convert_signed_num)
+        1    0.000    0.000    0.000    0.000 <frozen importlib._bootstrap_external>:1331(__init__)
+        5    0.000    0.000    0.000    0.000 <frozen importlib._bootstrap>:48(_new_module)
+       11    0.000    0.000    0.000    0.000 <frozen importlib._bootstrap_external>:185(_path_isabs)
+       40    0.000    0.000    0.000    0.000 <frozen importlib._bootstrap>:1225(__enter__)
+       40    0.000    0.000    0.000    0.000 <frozen importlib._bootstrap>:1229(__exit__)
+       30    0.000    0.000    0.000    0.000 <frozen importlib._bootstrap_external>:145(_path_stat)
+        8    0.000    0.000    0.000    0.000 <frozen importlib._bootstrap_external>:1337(<genexpr>)
+       10    0.000    0.000    0.000    0.000 <frozen importlib._bootstrap_external>:1352(_get_spec)
+       24    0.000    0.000    0.000    0.000 <frozen importlib._bootstrap>:648(parent)
+       10    0.000    0.000    0.000    0.000 <frozen importlib._bootstrap_external>:67(_relax_case)
+        1    0.000    0.000    0.000    0.000 <frozen posixpath>:166(basename)
+
+
diff --git a/docs/benchmarks/2026-10-12/baseline-refresh/raw/prof_mesh.py b/docs/benchmarks/2026-10-12/baseline-refresh/raw/prof_mesh.py
new file mode 100644
index 00000000..e367ead4
--- /dev/null
+++ b/docs/benchmarks/2026-10-12/baseline-refresh/raw/prof_mesh.py
@@ -0,0 +1,27 @@
+"""Run `rasputin mesh ...` from a bench.py pkg tree under cProfile.
+
+usage: python prof_mesh.py <pkg> <out.prof> mesh <args...>
+"""
+
+import cProfile
+import sys
+
+pkg, out = sys.argv[1], sys.argv[2]
+sys.path.insert(0, pkg)
+import tin_engine  # noqa: E402
+import tin_engine._core  # noqa: E402
+
+for module in (tin_engine, tin_engine._core):
+    if not str(module.__file__).startswith(pkg):
+        raise SystemExit(f"{module.__file__} is not under {pkg}")
+from tin_engine.cli import app  # noqa: E402
+
+sys.argv = ["rasputin", *sys.argv[3:]]
+profile = cProfile.Profile()
+profile.enable()
+try:
+    app(standalone_mode=False)
+except SystemExit:
+    pass
+profile.disable()
+profile.dump_stats(out)
diff --git a/docs/benchmarks/2026-10-12/baseline-refresh/raw/wait_idle_then_save.sh b/docs/benchmarks/2026-10-12/baseline-refresh/raw/wait_idle_then_save.sh
new file mode 100755
index 00000000..dd6754c9
--- /dev/null
+++ b/docs/benchmarks/2026-10-12/baseline-refresh/raw/wait_idle_then_save.sh
@@ -0,0 +1,25 @@
+#!/bin/zsh
+# Wait until the 1-minute load average is under 1.5 on two samples 30 s apart
+# (at most 45 minutes), then run the quick check with --save-baseline once.
+set -u
+TREE=/Users/skavhaug/projects/rasputin/.claude/worktrees/baseline-1012
+LOG=$TREE/docs/benchmarks/2026-10-12/baseline-refresh/quick-run-3-idle-save.log
+cd "$TREE" || exit 3
+deadline=$(( $(date +%s) + 45 * 60 ))
+low=0
+echo "# run 3 (wait for load < 1.5, then --save-baseline), started $(date '+%Y-%m-%d %H:%M:%S %z')" > "$LOG"
+while [ "$(date +%s)" -lt "$deadline" ]; do
+  load=$(sysctl -n vm.loadavg | awk '{print $2}')
+  echo "$(date +%H:%M:%S) load1 $load" >> "$LOG"
+  if [ "$(echo "$load < 1.5" | bc)" = 1 ]; then low=$((low + 1)); else low=0; fi
+  if [ "$low" -ge 2 ]; then
+    { echo "## pmset before"; pmset -g batt; echo "## uptime"; uptime; } >> "$LOG"
+    RASPUTIN_DATA=/Users/skavhaug/projects/rasputin_data .venv/bin/python tools/bench_quick.py run --save-baseline >> "$LOG" 2>&1
+    echo "exit $?" >> "$LOG"
+    { echo "## pmset after"; pmset -g batt; echo "## uptime after"; uptime; } >> "$LOG"
+    exit 0
+  fi
+  sleep 30
+done
+echo "GAVE UP: the load never fell under 1.5 on two samples before $(date '+%H:%M:%S')" >> "$LOG"
+exit 4
diff --git a/docs/benchmarks/quick/baseline-ac.json b/docs/benchmarks/quick/baseline-ac.json
index c4e09b53..88129626 100644
--- a/docs/benchmarks/quick/baseline-ac.json
+++ b/docs/benchmarks/quick/baseline-ac.json
@@ -1,5 +1,5 @@
 {
- "commit": "357808b1d23462b1ff5c71760a0a9943fff76dd4",
+ "commit": "969c49e2325491dfc2449f671b67d0f599d139ca",
  "machine": {
   "cpu_brand": "Apple M1 Max",
   "p_cores": 8,
@@ -20,7 +20,7 @@
   "$RASPUTIN_DATA/DTM10_UTM33_20260925": "dir:3eef3cfed8b6d7db435791da65386cc1dcbbbadc2a9b145567765eb67b1a3dac",
   "$RASPUTIN_DATA/numedalslagen_outline_nve.geojson": "file:554438:3069b1dbd2c22c87401fd57c3189f5a67d319f9aea0a95e90cc29886fa0dabca",
   "$RASPUTIN_DATA/corine2018_dtm10_utm33.gpkg": "file:440332288:1790574665364371436",
-  "$RASPUTIN_DATA/sweden_glo30_cache": "dir:3deaa80f96e39f4ae4b4d3df54646b17e47c70847fe450d9c3e377fe7d758e0f",
+  "$RASPUTIN_DATA/sweden_glo30_cache": "dir:f00da08071724a2a08e572e968895363735c53439f686134aa45b69f7cddc168",
   "$RASPUTIN_DATA/sweden_smhi_svar/lagan_mouth_svar2022_3006.geojson": "file:1294446:a93a524fc198bd3e516ea36db55734c3e5de3994be05e19c807ce5546454123e",
   "$RASPUTIN_DATA/corine_sql/u2018_clc2018_v2020_20u1_geoPackage/DATA/U2018_CLC2018_V2020_20u1.gpkg": "file:8855322624:1587553228000000000",
   "$RASPUTIN_DATA/banenor_banenettverk/section_domain.geojson": "file:2337:d3af5872ac6da011cc95eaade2328cfff965116a5756f68786cd1b1907d5e571",
@@ -33,94 +33,94 @@
    "mesh_sha256": "746bf5c68bb9464fbb0746a9de6e0a5dbc7a15d1bfa1006cd9000f95d870ee0e",
    "measures": {
     "total": {
-     "median": 0.415963875,
-     "min": 0.409482542,
-     "max": 0.418569459
+     "median": 0.429804542,
+     "min": 0.420502458,
+     "max": 0.460655292
     },
     "decode": {
-     "median": 0.060134583,
-     "min": 0.058657334,
-     "max": 0.061936625
+     "median": 0.069657209,
+     "min": 0.065302792,
+     "max": 0.104699708
     },
     "start mesh: build": {
-     "median": 0.00017525,
-     "min": 0.000171709,
-     "max": 0.0002175
+     "median": 0.000172,
+     "min": 0.000161958,
+     "max": 0.000177375
     },
     "start mesh: node": {
-     "median": 0.002629333,
-     "min": 0.002613791,
-     "max": 0.002672584
+     "median": 0.002643625,
+     "min": 0.002631708,
+     "max": 0.002696167
     },
     "start mesh: triangulate": {
-     "median": 0.029249291,
-     "min": 0.029212459,
-     "max": 0.029342375
+     "median": 0.02922475,
+     "min": 0.029188208,
+     "max": 0.029241083
     },
     "start mesh: constraint edges": {
-     "median": 0.006628292,
-     "min": 0.006577917,
-     "max": 0.006648291
+     "median": 0.006622791,
+     "min": 0.00661075,
+     "max": 0.006625958
     },
     "refine": {
-     "median": 0.18963575,
-     "min": 0.1840335,
-     "max": 0.191952709
+     "median": 0.19196575,
+     "min": 0.186674375,
+     "max": 0.193222875
     },
     "refine: legalise start": {
-     "median": 0.000456459,
-     "min": 0.000451666,
-     "max": 0.000465125
+     "median": 0.000452042,
+     "min": 0.00045125,
+     "max": 0.000461458
     },
     "refine: start quality": {
-     "median": 0.000719125,
-     "min": 0.000708791,
-     "max": 0.000743458
+     "median": 0.000820958,
+     "min": 0.000793375,
+     "max": 0.000866917
     },
     "refine: scan (parallel)": {
-     "median": 0.05605558699999999,
-     "min": 0.05550579000000001,
-     "max": 0.056878839
+     "median": 0.05690866699999998,
+     "min": 0.05651604699999998,
+     "max": 0.057285833999999994
     },
     "refine: split + flip (serial)": {
-     "median": 0.10617537000000003,
-     "min": 0.10221883000000001,
-     "max": 0.10878087500000003
+     "median": 0.107559795,
+     "min": 0.10220053900000002,
+     "max": 0.10860308200000005
     },
     "refine: setup + output": {
-     "median": 0.025143629999999972,
-     "min": 0.025011369000000006,
-     "max": 0.025580412999999996
+     "median": 0.026140790000000025,
+     "min": 0.025929829999999987,
+     "max": 0.026963121000000007
     },
     "edge strip: generate": {
-     "median": 0.000753459,
-     "min": 0.000740833,
-     "max": 0.00078125
+     "median": 0.000743834,
+     "min": 0.000724875,
+     "max": 0.000784083
     },
     "edge strip: scan (parallel)": {
-     "median": 0.001003834,
-     "min": 0.000992792,
-     "max": 0.00103425
+     "median": 0.00099525,
+     "min": 0.000984375,
+     "max": 0.001022125
     },
     "edge strip: split + flip (serial)": {
-     "median": 0.001039083,
-     "min": 0.001022792,
-     "max": 0.001111
+     "median": 0.001097208,
+     "min": 0.001032875,
+     "max": 0.001104708
     },
     "trim": {
-     "median": 0.017144458,
-     "min": 0.017099417,
-     "max": 0.017305166
+     "median": 0.017020416,
+     "min": 0.016889,
+     "max": 0.018209625
     },
     "write: encode": {
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