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>
1 file changed
tree: 6eadf67578bf25bac113b0cb17145cd775a828de
  1. .github/
  2. docs/
  3. hooks/
  4. man/
  5. release/
  6. subcmds/
  7. tests/
  8. .flake8
  9. .gitattributes
  10. .gitignore
  11. .gitreview
  12. .isort.cfg
  13. .mailmap
  14. .project
  15. .pydevproject
  16. color.py
  17. command.py
  18. completion.bash
  19. editor.py
  20. error.py
  21. event_log.py
  22. fetch.py
  23. git_command.py
  24. git_config.py
  25. git_refs.py
  26. git_ssh
  27. git_superproject.py
  28. git_trace2_event_log.py
  29. git_trace2_event_log_base.py
  30. hooks.py
  31. LICENSE
  32. main.py
  33. MANIFEST.in
  34. manifest_xml.py
  35. pager.py
  36. platform_utils.py
  37. platform_utils_win32.py
  38. progress.py
  39. project.py
  40. pyproject.toml
  41. README.md
  42. repo
  43. repo_logging.py
  44. repo_trace.py
  45. requirements.json
  46. run_tests
  47. run_tests.vpython3
  48. setup.py
  49. ssh.py
  50. SUBMITTING_PATCHES.md
  51. tox.ini
  52. wrapper.py
README.md

repo

Repo is a tool built on top of Git. Repo helps manage many Git repositories, does the uploads to revision control systems, and automates parts of the development workflow. Repo is not meant to replace Git, only to make it easier to work with Git. The repo command is an executable Python script that you can put anywhere in your path.

Contact

Please use the repo-discuss mailing list or issue tracker for questions.

You can file a new bug report under the “repo” component.

Please do not e-mail individual developers for support. They do not have the bandwidth for it, and often times questions have already been asked on repo-discuss or bugs posted to the issue tracker. So please search those sites first.

Install

Many distros include repo, so you might be able to install from there.

# Debian/Ubuntu.
$ sudo apt-get install repo

# Gentoo.
$ sudo emerge dev-vcs/repo

You can install it manually as well as it's a single script.

$ mkdir -p ~/.bin
$ PATH="${HOME}/.bin:${PATH}"
$ curl https://storage.googleapis.com/git-repo-downloads/repo > ~/.bin/repo
$ chmod a+rx ~/.bin/repo