[ty] Benchmark salsa-rs/salsa#1174

[MichaReiser]

Summary

Pin Salsa to salsa-rs/salsa#1174 to benchmark avoiding the memo-lookup type check against the Salsa master baseline in #26201.

Test Plan

Testing: All 696 ty_python_semantic tests and repository hooks passed.

[astral-sh-bot]

Typing conformance results

No changes detected ✅

Current numbers

The percentage of diagnostics emitted that were expected errors held steady at 94.37%. The percentage of expected errors that received a diagnostic held steady at 89.00%. The number of fully passing files held steady at 94/134.

[astral-sh-bot]

Memory usage report

Summary

Project	Old	New	Diff	Outcome
prefect	460.12MB	460.13MB	+0.00% (4.69kB)	⏫
sphinx	171.11MB	171.11MB	+0.00% (1.77kB)	⏫
trio	71.52MB	71.52MB	-	✅
flake8	29.71MB	29.70MB	-0.04% (12.31kB)	⬇️

Significant changes

Click to expand detailed breakdown

prefect

Name	Old	New	Diff	Outcome
parsed_module	19.32MB	19.32MB	+0.02% (4.69kB)	⏫

sphinx

Name	Old	New	Diff	Outcome
parsed_module	18.35MB	18.35MB	+0.01% (1.77kB)	⏫

flake8

Name	Old	New	Diff	Outcome
parsed_module	9.78MB	9.77MB	-0.12% (12.31kB)	⬇️

[astral-sh-bot]

ecosystem-analyzer results

No diagnostic changes detected ✅

Flaky changes detected. This PR summary excludes flaky changes; see the HTML report for details.

Full report with detailed diff (timing results)

[codspeed-hq]

Merging this PR will degrade performance by 4.65%

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

❌ 1 regressed benchmark
✅ 130 untouched benchmarks
⏩ 4 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	ty_micro[large_union_narrowing]	195.5 ms	205 ms	-4.65%

Tip

Investigate this regression with the CodSpeed MCP and your agent.

---

_{Comparing micha/salsa-1174-benchmark (7614d7e) with micha/salsa-master-benchmark (f185f06)}

Footnotes

1. 4 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[astral-sh-bot]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

✅ ecosystem check detected no linter changes.

Formatter (stable)

✅ ecosystem check detected no format changes.

Formatter (preview)

✅ ecosystem check detected no format changes.