[winitzki]

Some small LLM-generated fixes in benchmark display, motivated by my recent work on benchmarks:

• plots show error bars when stdev is available
• the Y axes start from 0 by default
• fix a bug with formatting the commit hashes in rare cases (commit hash 12345678e9 will no longer be parsed as a scientific-format float)
• the "time" plot goes first if it exists, then all others
• one can now load up to 500 commits when looking at the master branch, and add up to 50 master-branch commits when looking at a PR branch

After these changes, plots will look like this (cabal run benchmark-display -- --sqlite perf-2026-07-28.sqlite3 --branch master --limit 28 on the macbook):

[winitzki]

This should fix the formatting git commit hashes as text and not as auto-detected type.

[chrisdone-artificial]

Smashing!