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Title: gh-139109: A new tracing JIT compiler frontend for CPython by Fidget-Spinner · Pull Request #140310 · python/cpython · GitHub

Open Graph Title: gh-139109: A new tracing JIT compiler frontend for CPython by Fidget-Spinner · Pull Request #140310 · python/cpython

X Title: gh-139109: A new tracing JIT compiler frontend for CPython by Fidget-Spinner · Pull Request #140310 · python/cpython

Description: This PR changes the current JIT model from trace projection to trace recording. Benchmarking: better pyperformance (about 1.7% overall) geomean versus current https://raw.githubusercontent.com/face...

Open Graph Description: This PR changes the current JIT model from trace projection to trace recording. Benchmarking: better pyperformance (about 1.7% overall) geomean versus current https://raw.githubusercontent.com/face...

X Description: This PR changes the current JIT model from trace projection to trace recording. Benchmarking: better pyperformance (about 1.7% overall) geomean versus current https://raw.githubusercontent.com/face...

Opengraph URL: https://github.com/python/cpython/pull/140310

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gh-140277https://github.com/python/cpython/issues/140277
gh-139922: Tail calling for MSVC (VS 2026) #139962https://github.com/python/cpython/pull/139962
Trace recording JIT #139109https://github.com/python/cpython/issues/139109
Please reload this pagehttps://github.com/python/cpython/pull/140310
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September 18, 2025 17:00https://github.com/python/cpython/pull/140310#commits-pushed-795ef49
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fix a bug with specializzationhttps://github.com/python/cpython/pull/140310/commits/fba9d2d989f9fcda4824a65d9f8d669059b1a194
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Fully working bm_generatorshttps://github.com/python/cpython/pull/140310/commits/7192671f52b13a8748354e900609e36b08942e2e
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Fix handling of ENTER_EXECUTORhttps://github.com/python/cpython/pull/140310/commits/3066963b60873f08356c5917d2548182a651cb04
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Fix handling of EXTENDED_ARGhttps://github.com/python/cpython/pull/140310/commits/3e9f78211d6baec04a471855a4786f16fdb39026
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fix problem with jumping labelshttps://github.com/python/cpython/pull/140310/commits/fac8c748a5baefd1c3272bf53a9d3372df726bf5
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Fix unsupported opcode bug, turn off optimizer againhttps://github.com/python/cpython/pull/140310/commits/396818b9fc7baeae8016794450067023e1d19070
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fix branch tracinghttps://github.com/python/cpython/pull/140310/commits/57f417e91bd3278fcec090a026f0168408408317
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November 11, 2025 15:12https://github.com/python/cpython/pull/140310#commits-pushed-0658f1b
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pythonGH-140969https://github.com/python/cpython/pull/140969
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Merge branch 'main' of github.com:python/cpython into fix-issue24255https://github.com/CuriousLearner/cpython/commit/c240289cd6aa389ed8950d28f9248fadca9d071a
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pythongh-139653https://github.com/python/cpython/issues/139653
python#139668https://github.com/python/cpython/pull/139668
pythongh-141004https://github.com/python/cpython/issues/141004
pythonGH-141378https://github.com/python/cpython/pull/141378
pythongh-141004https://github.com/python/cpython/issues/141004
pythonGH-141009https://github.com/python/cpython/pull/141009
pythongh-137959https://github.com/python/cpython/issues/137959
pythonGH-141496https://github.com/python/cpython/pull/141496
pythongh-139871https://github.com/python/cpython/issues/139871
pythonGH-140128https://github.com/python/cpython/pull/140128
pythongh-140601https://github.com/python/cpython/issues/140601
pythonGH-141499https://github.com/python/cpython/pull/141499
pythongh-135801https://github.com/python/cpython/issues/135801
pythonGH-139652https://github.com/python/cpython/pull/139652
pythongh-140260https://github.com/python/cpython/issues/140260
python#140909https://github.com/python/cpython/pull/140909
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