GH-96793: Specialize FOR_ITER for generators. by markshannon · Pull Request #98772 · python/cpython · GitHub

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Enable specialization of iteration over generators, for gen():, and awaiting coroutines, await coro() #96793

Specialize FOR_ITER for generators.

awaiting core review

https://github.com/python/cpython/compare/main...faster-cpython:cpython:specialize-for-iter-gen-handle-exc-stack?expand=1

https://github.com/python/cpython/compare/main...faster-cpython:cpython:specialize-for-iter-gen-handle-exc-stack?expand=1 fixes the gi_exc_state issue, but is messy. I think this would benefit from merging #96319 first

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https://github.com/python/cpython/pull/98772/files#diff-c22186367cbe20233e843261998dc027ae5f1f8c0d2e778abfa454ae74cc59deR2087

Because it's the offset for YIELD_VALUE to return to relative to RETURN_VALUE https://github.com/python/cpython/pull/98772/files#diff-c22186367cbe20233e843261998dc027ae5f1f8c0d2e778abfa454ae74cc59deR2087

https://github.com/python/pyperformance/blob/main/pyperformance/data-files/benchmarks/bm_generators/run_benchmark.py

I suspect there aren't enough uses of generators in the benchmark suite for this to make a difference.

Merge branch 'main' into specialize-for-iter-gen

Clean up after merge.

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Add test for nested exc_info in loop.

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Use new API for current exception

pylint is broken with CPython main #101914

Python 3.12 - ValueError: generator already executing pylint-dev/pylint#9138