[mypyc] Make native attribute writes faster with free threading - #21748
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JukkaL wants to merge 8 commits into
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[mypyc] Make native attribute writes faster with free threading#21748JukkaL wants to merge 8 commits into
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JukkaL
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July 18, 2026 13:01
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@msullivan This is a potentially faster way to implement memory safe attribute access. |
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I measured the impact to self-check, and on Linux/AMD Ryzen, this improves performance by about 2.7%, and on macOS/M1 Pro performance improves by about 2.3%. In microbenchmarks performance impact is all over the place and on Apple Silicon they were slower on average, but I trust the self check benchmark more. |
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WIP: This is a prototype created using Codex, which looks faster for attribute set in a micro-benchmark, since we don't do delayed decref. I still need to measure impact to self check and review manually. I will be on vacation for ~2 weeks and wanted to get this out for others to have a look.