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gh-131798: Propagate iterator types from GET_ITER in the JIT - #157011
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lgeiger wants to merge 1 commit into
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lgeiger
requested review from
Fidget-Spinner,
markshannon,
savannahostrowski and
tomasr8
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September 5, 2026 22:35
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Sorry, all JIT development is currently paused until a PEP is accepted by the steering council. You can search the Python Discourse to learn more! |
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OK, sorry. Wasn't aware. |
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This was referenced Oct 20, 2026
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This PR propagates the iterator result types for dicts and sets in the jit optimiser.
This removes a _GUARD_TYPE_ITERguard when GET_ITER and FOR_ITER are in the same trace.
I ran a small microbenchmark on macOS aarch64 that repeatedly iterated over small dictionaries and sets: it seems like this change shows up a 1% improvement, but results are very noisy.