tree 166ab904a53a836a1f01b8783a39406cd491ce4a
parent e300c7d106a881eb25a4fc613637dfb2175e54a3
author Mike Frysinger <vapier@chromium.org> 1568345746 -0400
committer chrome-bot <chrome-bot@chromium.org> 1568404459 -0700

pre-upload: cache repeated git operations

We have a lot of places that run the same git command on the same git
commit to get the same data.  Cache the results across runs to avoid
that overhead.

Running on my local chromite branch with 15 commits, this cuts the time
from to process from ~37s to ~13s.

BUG=None
TEST=unittests pass

Change-Id: Ic920f734af8523fe31db29bd07e6661c03321250
Reviewed-on: https://chromium-review.googlesource.com/1802577
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Allen Webb <allenwebb@google.com>