Improve performance in _manylinux.py #869
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pradyunsg
approved these changes
May 10, 2025
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@pradyunsg thanks for the review, do you know the best way to advocate to get this PR merged that is respectful of the time/notification inbox of the maintainers? |
cthoyt
commented
May 19, 2025
| if glibc_version in _LEGACY_MANYLINUX_MAP: | ||
| legacy_tag = _LEGACY_MANYLINUX_MAP[glibc_version] | ||
| if _is_compatible(arch, glibc_version): | ||
| yield "manylinux_{}_{}_{}".format(*glibc_version, arch) |
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this replaces the combination of tag = "manylinux_{}_{}".format(*glibc_version) and yield f"{tag}_{arch}" since these two string format operations are done in succession (without, imo, the intermediate name adding any useful context nor being reused anywhere)
cthoyt
commented
May 19, 2025
| # Handle the legacy manylinux1, manylinux2010, manylinux2014 tags. | ||
| if glibc_version in _LEGACY_MANYLINUX_MAP: | ||
| legacy_tag = _LEGACY_MANYLINUX_MAP[glibc_version] | ||
| if _is_compatible(arch, glibc_version): |
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the doubled call to _is_compatible is combine
henryiii
approved these changes
May 22, 2025
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Thanks! |
konstin
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May 28, 2025
## Summary This PR makes a few performance improvements: 1. Reduces the need to unpack and repack a `_GLibCVersion` tuple 2. Reduces the doubled call to `_is_compatible(arch, glibc_version)` 3. Moves the assignment of the `tag` variable directly into the yield, reducing memory allocation in case this is never used when `_is_compatible(arch, glibc_version)` is false 4. Combines the check of the `glibc_version` being in `_LEGACY_MANYLINUX_MAP` and the assignment to the variable together. I'm not sure if this is actually better, but using the assignment expression reduces this from 4 lines to 2 ## Test Plan I upstreamed these changes in pypa/packaging#869. Otherwise, I'm pretty confident this is a minor change that works the same
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This PR makes a few performance improvements:
_is_compatible(arch, glibc_version)tagvariable directly into the yield, reducing memory allocation in case this is never used when_is_compatible(arch, glibc_version)is false