Dense link stores by ahejlsberg · Pull Request #64711 · microsoft/TypeScript

Anders Hejlsberg (ahejlsberg) · 2026-10-09T22:43:03Z

Analysis has revealed that our paged link stores (see microsoft/typescript-go#4329) are inefficient when compilation uses multiple checkers. For example, with 8 checkers as much as 80% of paged link storage is wasted. With this PR we change the paged link store implementation to ensure dense allocation and more efficient utilization of storage. For example, the new implementation reduces the memory usage by 8-9% when compiling VS Code with 8 checkers.

Anders Hejlsberg (ahejlsberg) · 2026-10-09T22:43:48Z

TypeScript Bot (@typescript-bot) test it

typescript-automation · 2026-10-09T22:43:53Z

Starting jobs; this comment will be updated as builds start and complete.

Command	Status	Results
`test top400`	✅ Started	✅ Results
`user test this`	✅ Started	✅ Results
`run dt`	✅ Started	✅ Results
`perf test this faster`	✅ Started	👀 Results

Copilot

🟡 Changes recommended

The new ID allocation and fallback invariants need focused regression tests.

1 open finding

Add regression tests for ID allocation edge cases · New

What changed in this PR

Reworks checker link storage to reduce memory waste across parallel checkers through dense, block-based ID allocation.

Changes:

Adds reserved 256-ID block generators for nodes and symbols.
Stores paged links indirectly in dense arenas.
Routes out-of-range IDs through map-backed storage.

File	Description
`tsc/internal/core/linkstore.go`	Implements arena-backed paged links.
`tsc/internal/checker/links.go`	Adds dense paged/fallback routing.
`tsc/internal/checker/checker.go`	Adopts the new symbol link store.
`tsc/internal/ast/utilities.go`	Adds block-based ID generators.

🧠 Review effort: Balanced

💡 Add a code-review agent skill for context-aware, tailored reviews. Learn more in the docs.

+func (a *NodeIdGenerator) GetNodeId(node *Node) NodeId {
+	id := node.id.Load()
+	if id == 0 {
+		if a.nextId == a.lastId {
+			a.nextId = nextNodeBlockId.Add(BlockIdSize) - BlockIdSize


typescript-automation · 2026-10-09T23:08:50Z

Hey Anders Hejlsberg (@ahejlsberg), the results of running the DT tests are ready.

Everything looks the same!

You can check the log here.

typescript-automation · 2026-10-09T23:15:11Z

Anders Hejlsberg (@ahejlsberg)
The results of the perf run you requested are in!

Here they are:

tsc

Comparison Report - baseline..pr

_Metric	_baseline	_pr	_Delta	_Best	_Worst	_p-value
_{Compiler-Unions - native}
_Errors	₄₁	₄₁	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_115,276	_115,276	_~	_~	_~	_{p=1.000 n=12}
_Types	_79,613	_79,613	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{135,338k (± 0.06%)}	_{133,927k (± 0.07%)}	_{-1,411k (- 1.04%)}	_133,687k	_134,136k	_{p=0.000 n=12}
_{Memory Allocs}	_{2,190,669 (± 0.01%)}	_{2,190,141 (± 0.01%)}	_{-528 (- 0.02%)}	_2,189,697	_2,190,653	_{p=0.000 n=12}
_{Config Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.041s (± 3.93%)}	_{0.041s (± 3.39%)}	_~	_0.039s	_0.045s	_{p=0.572 n=12}
_{Bind Time}	_{0.012s (±11.13%)}	_{0.013s (±15.30%)}	_~	_0.010s	_0.019s	_{p=0.442 n=12}
_{Check Time}	_{0.493s (± 1.03%)}	_{0.502s (± 1.04%)}	_{+0.010s (+ 1.93%)}	_0.492s	_0.524s	_{p=0.013 n=12}
_{Emit Time}	_{0.266s (± 2.93%)}	_{0.269s (± 2.66%)}	_~	_0.248s	_0.284s	_{p=0.369 n=12}
_{Total Time}	_{0.818s (± 1.19%)}	_{0.832s (± 0.90%)}	_{+0.015s (+ 1.78%)}	_0.811s	_0.847s	_{p=0.012 n=12}
_{angular-1 - native}
_Errors	₃	₃	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_{845,791 (± 0.10%)}	_{845,668 (± 0.05%)}	_~	_844,332	_847,119	_{p=0.713 n=12}
_Types	_{248,126 (± 0.00%)}	_{248,124 (± 0.00%)}	_~	_248,122	_248,126	_{p=0.154 n=12}
_{Memory Used}	_{764,604k (± 0.02%)}	_{750,472k (± 0.02%)}	_{-14,132k (- 1.85%)}	_750,142k	_750,721k	_{p=0.000 n=12}
_{Memory Allocs}	_{12,926,045 (± 0.09%)}	_{12,911,604 (± 0.01%)}	_{-14,442 (- 0.11%)}	_12,908,798	_12,918,710	_{p=0.000 n=12}
_{Config Time}	_0.017s	_0.017s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.257s (± 3.01%)}	_{0.259s (± 1.55%)}	_~	_0.245s	_0.269s	_{p=0.559 n=12}
_{Bind Time}	_{0.059s (± 4.29%)}	_{0.059s (± 3.44%)}	_~	_0.057s	_0.069s	_{p=0.889 n=12}
_{Check Time}	_0s	_0s	_~	_~	_~	_{p=1.000 n=12}
_{Emit Time}	_{1.564s (± 0.96%)}	_{1.558s (± 1.05%)}	_~	_1.532s	_1.633s	_{p=0.173 n=12}
_{Total Time}	_{1.908s (± 0.98%)}	_{1.905s (± 0.97%)}	_~	_1.882s	_1.993s	_{p=0.660 n=12}
_{mui-docs - native}
_Errors	_11,405	_11,405	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_4,359,614	_4,359,614	_~	_~	_~	_{p=1.000 n=12}
_Types	_1,376,379	_1,376,379	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{2,872,408k (± 0.05%)}	_{2,813,378k (± 0.04%)}	_{-59,031k (- 2.06%)}	_2,810,707k	_2,817,220k	_{p=0.000 n=12}
_{Memory Allocs}	_{32,834,662 (± 0.06%)}	_{32,834,726 (± 0.11%)}	_~	_32,776,933	_32,951,605	_{p=0.514 n=12}
_{Config Time}	_0.017s	_0.017s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.490s (± 3.18%)}	_{0.498s (± 1.87%)}	_~	_0.468s	_0.522s	_{p=0.580 n=12}
_{Bind Time}	_0.002s	_0.002s	_~	_~	_~	_{p=1.000 n=12}
_{Check Time}	_{8.599s (± 0.52%)}	_{8.641s (± 0.49%)}	_~	_8.518s	_8.713s	_{p=0.198 n=12}
_{Emit Time}	_{0.545s (±14.54%)}	_{0.459s (± 7.50%)}	_~	_0.420s	_0.575s	_{p=0.369 n=12}
_{Total Time}	_{10.411s (± 0.73%)}	_{10.385s (± 0.51%)}	_~	_10.218s	_10.491s	_{p=0.117 n=12}
_{strada-build-src - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_1,390,229	_1,390,229	_~	_~	_~	_{p=1.000 n=12}
_Types	_441,498	_441,498	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{1,654,977k (± 0.82%)}	_{1,635,393k (± 0.86%)}	_{-19,584k (- 1.18%)}	_1,606,760k	_1,666,229k	_{p=0.028 n=12}
_{Memory Allocs}	_{92,198,939 (± 0.16%)}	_{92,089,944 (± 0.18%)}	_~	_91,488,261	_92,327,860	_{p=0.219 n=12}
_{Config Time}	_{0.004s (± 9.04%)}	_{0.003s (±12.31%)}	_~	_0.002s	_0.004s	_{p=0.733 n=12}
_{Parse Time}	_{0.197s (± 5.03%)}	_{0.193s (± 4.21%)}	_~	_0.178s	_0.218s	_{p=0.486 n=12}
_{Bind Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Check Time}	_{1.793s (± 0.51%)}	_{1.808s (± 0.46%)}	_{+0.015s (+ 0.81%)}	_1.783s	_1.825s	_{p=0.011 n=12}
_{Emit Time}	_{0.295s (± 3.76%)}	_{0.310s (± 3.17%)}	_~	_0.291s	_0.340s	_{p=0.086 n=12}
_{Total Time}	_{23.173s (± 0.77%)}	_{23.546s (± 0.79%)}	_{+0.373s (+ 1.61%)}	_22.996s	_24.143s	_{p=0.008 n=12}
_{strada-compiler - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_334,953	_334,953	_~	_~	_~	_{p=1.000 n=12}
_Types	_197,616	_197,616	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{302,628k (± 0.04%)}	_{297,337k (± 0.02%)}	_{-5,292k (- 1.75%)}	_297,194k	_297,607k	_{p=0.000 n=12}
_{Memory Allocs}	_{4,623,394 (± 0.01%)}	_{4,620,754 (± 0.01%)}	_{-2,641 (- 0.06%)}	_4,619,083	_4,621,509	_{p=0.000 n=12}
_{Config Time}	_0.001s	_0.001s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.111s (± 5.37%)}	_{0.110s (± 3.55%)}	_~	_0.100s	_0.120s	_{p=0.788 n=12}
_{Bind Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Check Time}	_{1.034s (± 0.51%)}	_{1.039s (± 0.35%)}	_~	_1.031s	_1.053s	_{p=0.138 n=12}
_{Emit Time}	_{0.143s (± 9.59%)}	_{0.136s (± 5.63%)}	_~	_0.120s	_0.159s	_{p=0.061 n=12}
_{Total Time}	_{1.345s (± 0.96%)}	_{1.338s (± 0.80%)}	_~	_1.308s	_1.371s	_{p=0.103 n=12}
_{ts-pre-modules - native}
_Errors	₈₇	₈₇	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_303,834	_303,834	_~	_~	_~	_{p=1.000 n=12}
_Types	_181,663	_181,663	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{263,563k (± 0.03%)}	_{258,162k (± 0.01%)}	_{-5,401k (- 2.05%)}	_258,110k	_258,242k	_{p=0.000 n=12}
_{Memory Allocs}	_{1,615,965 (± 0.01%)}	_{1,613,559 (± 0.01%)}	_{-2,406 (- 0.15%)}	_1,613,189	_1,613,885	_{p=0.000 n=12}
_{Config Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.098s (± 2.82%)}	_{0.100s (± 4.39%)}	_~	_0.085s	_0.109s	_{p=0.146 n=12}
_{Bind Time}	_{0.038s (± 9.10%)}	_{0.039s (±11.73%)}	_~	_0.027s	_0.048s	_{p=0.680 n=12}
_{Check Time}	_{0.814s (± 0.71%)}	_{0.816s (± 0.63%)}	_~	_0.802s	_0.828s	_{p=0.503 n=12}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Total Time}	_{0.963s (± 0.70%)}	_{0.968s (± 0.89%)}	_~	_0.945s	_0.989s	_{p=0.297 n=12}
_{vscode - native}
_Errors	₃₉₅	₃₉₅	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_11,178,984	_11,178,984	_~	_~	_~	_{p=1.000 n=12}
_Types	_3,695,590	_3,695,590	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{6,740,328k (± 0.01%)}	_{6,481,132k (± 0.01%)}	_{🟩-259,196k (- 3.85%)}	_6,478,380k	_6,483,083k	_{p=0.000 n=12}
_{Memory Allocs}	_{55,027,552 (± 0.01%)}	_{54,921,776 (± 0.02%)}	_{-105,776 (- 0.19%)}	_54,905,185	_54,963,880	_{p=0.000 n=12}
_{Config Time}	_{0.075s (± 0.56%)}	_{0.075s (± 0.24%)}	_~	_0.074s	_0.075s	_{p=0.784 n=12}
_{Parse Time}	_{1.822s (± 3.42%)}	_{1.816s (± 3.31%)}	_~	_1.682s	_1.986s	_{p=0.671 n=12}
_{Bind Time}	_{0.613s (±16.45%)}	_{0.619s (±19.84%)}	_~	_0.448s	_0.951s	_{p=0.919 n=12}
_{Check Time}	_{15.172s (± 1.07%)}	_{14.914s (± 0.97%)}	_{-0.258s (- 1.70%)}	_14.613s	_15.211s	_{p=0.024 n=12}
_{Emit Time}	_{5.064s (±11.66%)}	_{5.147s (± 9.15%)}	_~	_4.203s	_5.980s	_{p=0.875 n=12}
_{Total Time}	_{22.836s (± 2.13%)}	_{22.662s (± 1.79%)}	_~	_21.782s	_23.431s	_{p=0.266 n=12}
_{webpack - native}
_Errors	₅₈₄	₅₈₄	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_1,306,646	_1,306,646	_~	_~	_~	_{p=1.000 n=12}
_Types	_618,489	_618,489	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{967,360k (± 0.02%)}	_{945,626k (± 0.02%)}	_{-21,734k (- 2.25%)}	_945,186k	_946,190k	_{p=0.000 n=12}
_{Memory Allocs}	_{6,628,579 (± 0.02%)}	_{6,619,097 (± 0.01%)}	_{-9,482 (- 0.14%)}	_6,617,822	_6,622,643	_{p=0.000 n=12}
_{Config Time}	_0.009s	_0.009s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.285s (± 3.41%)}	_{0.288s (± 2.84%)}	_~	_0.266s	_0.310s	_{p=0.384 n=12}
_{Bind Time}	_{0.088s (±17.78%)}	_{0.079s (±11.11%)}	_~	_0.062s	_0.101s	_{p=0.541 n=12}
_{Check Time}	_{1.979s (± 0.54%)}	_{1.957s (± 0.45%)}	_{-0.022s (- 1.10%)}	_1.931s	_1.975s	_{p=0.004 n=12}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Total Time}	_{2.396s (± 0.65%)}	_{2.369s (± 0.25%)}	_{-0.026s (- 1.10%)}	_2.354s	_2.388s	_{p=0.001 n=12}
_{xstate-main - native}
_Errors	₀	₀	_~	_~	_~	_{p=1.000 n=12}
_Symbols	_1,061,928	_1,061,928	_~	_~	_~	_{p=1.000 n=12}
_Types	_389,645	_389,645	_~	_~	_~	_{p=1.000 n=12}
_{Memory Used}	_{571,326k (± 0.02%)}	_{554,309k (± 0.02%)}	_{-17,017k (- 2.98%)}	_554,052k	_554,537k	_{p=0.000 n=12}
_{Memory Allocs}	_{4,891,140 (± 0.09%)}	_{4,882,072 (± 0.07%)}	_{-9,068 (- 0.19%)}	_4,873,109	_4,889,991	_{p=0.001 n=12}
_{Config Time}	_0.003s	_0.003s	_~	_~	_~	_{p=1.000 n=12}
_{Parse Time}	_{0.141s (± 3.35%)}	_{0.143s (± 4.04%)}	_~	_0.130s	_0.164s	_{p=0.681 n=12}
_{Bind Time}	_{0.053s (±16.81%)}	_{0.047s (±17.11%)}	_~	_0.033s	_0.075s	_{p=0.271 n=12}
_{Check Time}	_{1.144s (± 0.65%)}	_{1.129s (± 0.53%)}	_{-0.015s (- 1.31%)}	_1.113s	_1.144s	_{p=0.002 n=12}
_{Emit Time}	_0.000s	_0.000s	_~	_~	_~	_{p=1.000 n=12}
_{Total Time}	_{1.350s (± 0.95%)}	_{1.334s (± 0.70%)}	_{-0.016s (- 1.17%)}	_1.304s	_1.352s	_{p=0.021 n=12}

System info unknown

Hosts

native

Scenarios

Compiler-Unions - native
angular-1 - native
mui-docs - native
strada-build-src - native
strada-compiler - native
ts-pre-modules - native
vscode - native
webpack - native
xstate-main - native

_Benchmark	_Name	_Iterations
_Current	_pr	₁₂
_Baseline	_baseline	₁₂

Developer Information:

Download Benchmarks

typescript-automation · 2026-10-09T23:35:14Z

Anders Hejlsberg (@ahejlsberg) Here are the results of running the user tests with tsc comparing baseline and pr:

Everything looks good!

typescript-automation · 2026-10-09T23:56:34Z

Anders Hejlsberg (@ahejlsberg) Here are the results of running the top 400 repos with tsc comparing baseline and pr:

Everything looks good!

- Moved nodeLinks, symbolReferenceLinks, mappedSymbolLinks and aliasSymbolLinks off pointer-keyed maps onto the id-indexed nodeLinkStore and symbolLinkStore, which keep exact Has/TryGet membership and stable pointers. - Only node and symbol ids are shared across checkers; pages and entries stay per checker (checker -race clean). - Measured on the original series, before microsoft#64711: Sentry user CPU -5% with one checker, -2.5% with four; peak RSS within noise.

- PagedLinkStore pages now hold uint32 offsets into stable 1024-entry value blocks rather than pointers to arena entries, so the collector no longer scans the page arrays. - Membership, zero initialization and returned addresses are unchanged; an explicit guard panics past 4,294,967,295 live entries per store. - Measured on the original series, before microsoft#64711: Sentry, four checkers: retained heap -4.9%, peak RSS -12%, pointer page memory 501MB -> 220MB; single-threaded instructions with GC off drop on every measured app.

- Fresh heap memory comes zeroed from the OS and is usually read before it is written (nil checks, lazily set fields). On Linux that first read maps the shared zero page, and the following write takes a second, copy-on-write fault whose TLB shootdown interrupts every other thread of the process. - Arenas and paged link stores now write one byte to each page of a new chunk, so each page faults once, writable. - Measured on the original series, before microsoft#64711: Playwright with 8 checkers on an 8-core Linux machine: TLB flushes 513k -> 99k, CPU time -22%, wall time -20%. With the rest of that series applied, removing it costs 19-36% wall time on Playwright, TypeORM and VS Code.

- The merged-symbol table and eleven of the symbol link stores were Go maps keyed by symbol pointer. getMergedSymbol alone runs on nearly every symbol resolution, and each lookup hashed the pointer and probed a table of hundreds of thousands of entries. - They are now symbolLinkStores indexed by dense symbol ids, like the other hot link kinds. ReverseMappedSymbolLinks stays a map: it is an exported field, which would expose the unexported store type. Merged-symbol lookups assign no ids to symbols that have none, as the map did not: unique symbols' internal property names embed ids. - Measured on the original series, before microsoft#64711: interleaved runs on an 8-core Linux machine: Sentry -6% and VS Code -3% wall time with 4 checkers, Playwright -6% with 8; the other runs are within noise. Peak RSS rises by 1-2%.

- Moved nodeLinks, symbolReferenceLinks, mappedSymbolLinks and aliasSymbolLinks off pointer-keyed maps onto the id-indexed nodeLinkStore and symbolLinkStore, which keep exact Has/TryGet membership and stable pointers. - Only node and symbol ids are shared across checkers; pages and entries stay per checker (checker -race clean). - Measured on the original series, before microsoft#64711: Sentry user CPU -5% with one checker, -2.5% with four; peak RSS within noise.

- PagedLinkStore pages now hold uint32 offsets into stable 1024-entry value blocks rather than pointers to arena entries, so the collector no longer scans the page arrays. - Membership, zero initialization and returned addresses are unchanged; an explicit guard panics past 4,294,967,295 live entries per store. - Measured on the original series, before microsoft#64711: Sentry, four checkers: retained heap -4.9%, peak RSS -12%, pointer page memory 501MB -> 220MB; single-threaded instructions with GC off drop on every measured app.

- Fresh heap memory comes zeroed from the OS and is usually read before it is written (nil checks, lazily set fields). On Linux that first read maps the shared zero page, and the following write takes a second, copy-on-write fault whose TLB shootdown interrupts every other thread of the process. - Arenas and paged link stores now write one byte to each page of a new chunk, so each page faults once, writable. - Measured on the original series, before microsoft#64711: Playwright with 8 checkers on an 8-core Linux machine: TLB flushes 513k -> 99k, CPU time -22%, wall time -20%. With the rest of that series applied, removing it costs 19-36% wall time on Playwright, TypeORM and VS Code.

- The merged-symbol table and eleven of the symbol link stores were Go maps keyed by symbol pointer. getMergedSymbol alone runs on nearly every symbol resolution, and each lookup hashed the pointer and probed a table of hundreds of thousands of entries. - They are now symbolLinkStores indexed by dense symbol ids, like the other hot link kinds. ReverseMappedSymbolLinks stays a map: it is an exported field, which would expose the unexported store type. Merged-symbol lookups assign no ids to symbols that have none, as the map did not: unique symbols' internal property names embed ids. - Measured on the original series, before microsoft#64711: interleaved runs on an 8-core Linux machine: Sentry -6% and VS Code -3% wall time with 4 checkers, Playwright -6% with 8; the other runs are within noise. Peak RSS rises by 1-2%.

Anders Hejlsberg (ahejlsberg) added 2 commits October 9, 2026 15:18

Densely allocated link stores

5c53522

Add nil check

a6c67fa

Copilot AI balanced review requested due to automatic review settings October 9, 2026 22:43

github-project-automation Bot added this to PR Backlog Oct 9, 2026

github-project-automation Bot moved this to Not started in PR Backlog Oct 9, 2026

typescript-automation Bot assigned Anders Hejlsberg (ahejlsberg) Oct 9, 2026

typescript-automation Bot added Author: Team For Uncommitted Bug PR for untriaged, rejected, closed or missing bug labels Oct 9, 2026

Copilot started reviewing on behalf of Anders Hejlsberg (ahejlsberg) October 9, 2026 22:43

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Anders Hejlsberg (ahejlsberg) requested review from Daniel Rosenwasser (DanielRosenwasser), Ryan Cavanaugh (RyanCavanaugh) and Jake Bailey (jakebailey) October 9, 2026 22:44

Copilot AI reviewed Oct 9, 2026

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Comment thread tsc/internal/ast/utilities.go

Comment on lines +58 to +62

func (a *NodeIdGenerator) GetNodeId(node *Node) NodeId {

id := node.id.Load()

if id == 0 {

if a.nextId == a.lastId {

a.nextId = nextNodeBlockId.Add(BlockIdSize) - BlockIdSize

Jake Bailey (jakebailey) approved these changes Oct 9, 2026

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github-project-automation Bot moved this from Not started to Needs merge in PR Backlog Oct 9, 2026

Anders Hejlsberg (ahejlsberg) added this pull request to the merge queue Oct 9, 2026

Merged via the queue into main with commit aa81492 Oct 9, 2026
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Anders Hejlsberg (ahejlsberg) deleted the dense-link-stores branch October 9, 2026 23:51

github-project-automation Bot moved this from Needs merge to Done in PR Backlog Oct 9, 2026

Boshen (Boshen) mentioned this pull request Oct 10, 2026

perf(checker): port TypeScript dense link stores oxc-project/tsrs#283

Closed

Boshen (Boshen) mentioned this pull request Oct 19, 2026

Port upstream TypeScript oxc-project/tsrs#623

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Dense link stores - #64711

Dense link stores#64711
Anders Hejlsberg (ahejlsberg) merged 2 commits into
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dense-link-stores

Anders Hejlsberg (ahejlsberg) commented Oct 9, 2026

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Anders Hejlsberg (ahejlsberg) commented Oct 9, 2026

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