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Title: gh-142982: Specialize CALL_FUNCTION_EX by Fidget-Spinner · Pull Request #143391 · python/cpython · GitHub

Open Graph Title: gh-142982: Specialize CALL_FUNCTION_EX by Fidget-Spinner · Pull Request #143391 · python/cpython

X Title: gh-142982: Specialize CALL_FUNCTION_EX by Fidget-Spinner · Pull Request #143391 · python/cpython

Description: This adds a specialization for CALL_FUNCTION_EX for Python and non-Python frames. It should be slightly faster on the interpreter, and much faster on the JIT. Previously the JIT could not trace thr...

Open Graph Description: This adds a specialization for CALL_FUNCTION_EX for Python and non-Python frames. It should be slightly faster on the interpreter, and much faster on the JIT. Previously the JIT could not trace thr...

X Description: This adds a specialization for CALL_FUNCTION_EX for Python and non-Python frames. It should be slightly faster on the interpreter, and much faster on the JIT. Previously the JIT could not trace thr...

Opengraph URL: https://github.com/python/cpython/pull/143391

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JIT coverage can be improved considerably #142982https://github.com/python/cpython/issues/142982
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January 3, 2026 13:48https://github.com/python/cpython/pull/143391#commits-pushed-41fa9e3
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Implement CALL_FUNCTION_EX_PY specializationhttps://github.com/python/cpython/pull/143391/commits/41fa9e321a5e1acf3733d27192c3b1f7eb02b0c4
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Fix error pathhttps://github.com/python/cpython/pull/143391/commits/1c4d1ad1698084db42267d1f1c95385ef37daa32
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Rename to _PY_FRAME_EXhttps://github.com/python/cpython/pull/143391/commits/3687f0bf97151c973a114aa2169fe24df7e366b5
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expose the function to the JIThttps://github.com/python/cpython/pull/143391/commits/3e137abd7ec98ee9eb319e8b3ac41f018e55e8b4
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add call_ex non pyhttps://github.com/python/cpython/pull/143391/commits/5eee3d730c0b1aef3b21ba37cf192394302a4a9d
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fix testshttps://github.com/python/cpython/pull/143391/commits/56c3f863346ef2fc4f1981ef87b9d10c1a8eee21
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Merge remote-tracking branch 'upstream/main' into call_function_ex_pyhttps://github.com/python/cpython/pull/143391/commits/1f3d3cdb9440c28da805cf1c95aa01c71e5338b8
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Merge remote-tracking branch 'upstream/main' into call_function_ex_pyhttps://github.com/python/cpython/pull/143391/commits/f385b1fb15e7f08db0614cafdb833b6dcb00c833
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