[ty] Detect final methods through intersections.

[lerebear]

Summary

Test Plan

[astral-sh-bot]

Typing conformance results

No changes detected ✅

Current numbers

The percentage of diagnostics emitted that were expected errors held steady at 92.16%. The percentage of expected errors that received a diagnostic held steady at 87.31%. The number of fully passing files held steady at 92/134.

[astral-sh-bot]

Memory usage report

Memory usage unchanged ✅

[astral-sh-bot]

ecosystem-analyzer results

No diagnostic changes detected ✅

Full report with detailed diff (timing results)

[codspeed-hq]

Merging this PR will degrade performance by 12.92%

⚠️ 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

❌ 21 regressed benchmarks
✅ 46 untouched benchmarks
⏩ 60 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	hydra-zen	1.2 s	3.1 s	-60.5%
❌	WallTime	pydantic	10.1 s	15.4 s	-34.34%
❌	WallTime	multithreaded	1.6 s	2 s	-19.59%
❌	WallTime	altair	5.6 s	6.9 s	-19.2%
❌	WallTime	freqtrade	9.1 s	10.4 s	-12.85%
❌	Simulation	anyio	1.2 s	1.3 s	-8.74%
❌	Simulation	ty_check_file[incremental]	7.1 ms	7.8 ms	-8.44%
❌	Simulation	ty_micro[pydantic_core_schema_dict]	112.7 ms	121.6 ms	-7.3%
❌	Simulation	attrs	549.7 ms	591.5 ms	-7.06%
❌	WallTime	pandas	70.8 s	76 s	-6.75%
❌	WallTime	tanjun	3.2 s	3.4 s	-6.58%
❌	Memory	ty_micro[typeis_narrowing]	18.7 MB	20 MB	-6.26%
❌	Memory	ty_check_file[incremental]	136.9 KB	145.6 KB	-5.99%
❌	Simulation	ty_check_file[cold]	148.9 ms	157.9 ms	-5.69%
❌	Simulation	ty_micro[typevar_mapping_accumulation]	994 ms	1,053 ms	-5.6%
❌	WallTime	sympy	81.2 s	85.9 s	-5.49%
❌	Simulation	ty_micro[recursive_typed_dict_union_contextual_inference]	92.5 ms	97.2 ms	-4.83%
❌	Memory	ty_micro[vararg_parameter_type_accumulation]	10.9 MB	11.4 MB	-4.44%
❌	Memory	anyio	64.3 MB	67.1 MB	-4.14%
❌	Memory	ty_micro[pandas_tdd]	34.5 MB	36 MB	-4.05%
...	...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

Tip

Investigate this regression with the CodSpeed MCP and your agent.

---

_{Comparing lerebear/push-wnpokoynuoqu (5428fde) with lerebear/push-tpzpnlynlywm (080558b)}

Footnotes

1. 60 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. ↩