tree 6eadf67578bf25bac113b0cb17145cd775a828de
parent 25d6c7cc108bea4c81e124623bcf7f4b6832a914
author Sylvain <sylvain.desodt@gmail.com> 1694381701 +0200
committer LUCI <gerrit-scoped@luci-project-accounts.iam.gserviceaccount.com> 1694435305 +0000

project: Optimise GetCommitRevisionId when revisionId is set

When comparing 2 manifests, most of the time is
spent getting the relevant commit id as it relies
on _allrefs which ends up loading all git references.

However, the value from `revisionIs` (when it is valid)
could be used directly leading to a huge performance improvement
(from 180+ seconds to less than 0.01 sec which is more
than 25000 times faster for manifests with 700+ projects).

Bug: 295282548

Change-Id: I5881aa4b2326cc17bbb4ee91d23293111f76ad7e
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/385834
Tested-by: Sylvain Desodt <sylvain.desodt@gmail.com>
Reviewed-by: Mike Frysinger <vapier@google.com>
Commit-Queue: Sylvain Desodt <sylvain.desodt@gmail.com>