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PyCode_GetCode could be faster #93382

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Fidget-Spinner opened this issue May 31, 2022 · 0 comments · Fixed by #93383
Closed

PyCode_GetCode could be faster #93382

Fidget-Spinner opened this issue May 31, 2022 · 0 comments · Fixed by #93383
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3.12 interpreter-core performance

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@Fidget-Spinner
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@Fidget-Spinner Fidget-Spinner commented May 31, 2022 •
edited

This potentially affects tools like coverage.py. It also means anything using co_code in CPython frequently is significantly slower. Note that pre-3.11, most code would assume this operation is O(1), so it's probably called more often than we expect.

We should lazily initialise a hidden _co_code field and cache it there. Currently it creates a fresh bytes object on each co_code access. This is at best O(n).
@Fidget-Spinner Fidget-Spinner added the type-bug label May 31, 2022
@kumaraditya303 kumaraditya303 added performance and removed type-bug labels May 31, 2022
@Fidget-Spinner Fidget-Spinner mentioned this issue May 31, 2022
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@Fidget-Spinner Fidget-Spinner changed the title PyCode_GetCode is really slow PyCode_GetCode could be faster May 31, 2022
@AA-Turner AA-Turner added interpreter-core 3.12 labels May 31, 2022
Fidget-Spinner added a commit that referenced this issue Jun 3, 2022
@Fidget-Spinner @kumaraditya303 @sweeneyde
gh-93382: Cache result of PyCode_GetCode in codeobject (GH-93383)
d52ffc1 
Co-authored-by: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
Co-authored-by: Dennis Sweeney <36520290+sweeneyde@users.noreply.github.com>
Fidget-Spinner added a commit to Fidget-Spinner/cpython that referenced this issue Jun 4, 2022
@Fidget-Spinner @kumaraditya303 @sweeneyde
pythongh-93382: Cache result of PyCode_GetCode in codeobject (pytho…
13642ce 
…nGH-93383)

Co-authored-by: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
Co-authored-by: Dennis Sweeney <36520290+sweeneyde@users.noreply.github.com>
@kumaraditya303 kumaraditya303 mentioned this issue Jun 11, 2022
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gh-93382: Cache result of PyCode_GetCode in codeobject Fidget-Spinner/cpython
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@AA-Turner @Fidget-Spinner @kumaraditya303