tree 68a1f325f1700e624520c8863e2afc1027eccbae
parent f6f5946422097f2559cf3bc39a69d5fddc838ab8
author Gavin Mak <gavinmak@google.com> 1787673348 -0700
committer gerrit-scoped@luci-project-accounts.iam.gserviceaccount.com <gerrit-scoped@luci-project-accounts.iam.gserviceaccount.com> 1790023206 -0700

info: reuse branch snapshots and combine history walks

Derive the current branch from GetBranches so attached HEAD and refs are
resolved once, including overview reporting. Replace the two
complementary rev-list calls in --all output with one --left-right
symmetric-difference walk and partition its records in memory.

Bug: 553599402
Change-Id: I01d5db804cbf591ecc0e08d6605971f0f5a38538
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/634005
Tested-by: Gavin Mak <gavinmak@google.com>
Reviewed-by: Brian Gan <brgan@google.com>
Commit-Queue: Gavin Mak <gavinmak@google.com>