Josiah Kiehl 7c09ebfd12 Optimize CheckForCommitObjects by batching git ls-tree operations ...

Significantly reduces the execution time of presubmit checks by
optimizing CheckForCommitObjects.

For CLs with fewer than 1000 affected files, run `git ls-tree` only on
specific files instead of scanning the full tree. This yields a ~70x
speedup (~0.97s -> ~0.01s) for typical CLs.

Change-Id: Ia8b89dbb14a5129ba79944282deba52a3558bdf2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/7234371
Commit-Queue: Josiah Kiehl <kiehl@google.com>
Reviewed-by: Yiwei Zhang <yiwzhang@google.com>

2025-12-09 15:07:14 -08:00

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