perf: pass --no-compile for build dependencies#13192
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notatallshaw
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Jan 29, 2025
As the build environment is ephemeral, it's wasteful to pre-compile everything, especially as not every Python module will be used/compiled in most cases. In addition, the argument is that compilation ensures read-only installations are not slower than necessary is moot as the build environment is by design writable. This saves ~200ms while installing setuptools while building pip itself. For context, a pip install . (with --no-index and --find-links) takes 3400ms on main and pip wheel . takes 2200ms on main. So, it's not a major win, but it's also nothing to sneeze at. Packages using smaller backends, like flit, will likely see smaller improvements.
sbidoul
approved these changes
Jan 30, 2025
pradyunsg
approved these changes
Jan 30, 2025
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Thanks for the reviews folks! |
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As the build environment is ephemeral, it's wasteful to pre-compile everything, especially as not every Python module will be used/compiled in most cases. In addition, the argument is that compilation ensures read-only installations are not slower than necessary is moot as the build environment is by design writable.
This saves ~200ms while installing setuptools while building pip itself. For context, a
pip install .(with--no-indexand--find-links) takes 3400ms andpip wheel .takes 2200ms on main.So, it's not a major win, but it's also nothing to sneeze at. Packages using smaller backends, like flit, will likely see smaller improvements.
Towards #7294
To try this out for yourself, you can use
--no-index --find-links tests/data/common_wheels/to pull setuptools from disk and eliminate the network as variable.