Optimize validate_sha() with --max-count=1
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Optimize the `validate_sha()` function with `--max-count=1` to prevent printing the git log of every single commit. This makes the function near instant.
ezio-melotti
approved these changes
Jan 28, 2024
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Optimize the
validate_sha()function with--max-count=1to prevent printing the git log of every single commit. See the "Commit Limiting" section ofgit-log's man pageThis makes the function near instant.
Currently, running
time git log main > /dev/nulltakes about ~1s second for me on the CPython repo, whiletime git log --max-count=1 main > /dev/null(with or without the-rflag) only takes about 0.003s.Additionally, if you've cloned the CPython repo using a blobless clone (e.g. with
git clone --filter=blob:none https://github.com/python/cpython.git), doing agit log -rtakes a very long time (almost an hour for me on a slow internet connection!), since the-rflag seems to force downloading a blob for every single commit, which makes a blobless clone kind of useless.