[PATCH 0/4] Add --no-ahead-behind to status

From: Jeff Hostetler <jeffhost@microsoft.com>

This patch series adds a "--no-ahead-behind" option to status to request that it avoid a possibly expensive ahead/behind computation for the current branch. Instead, it just prints a not up to date message in place of the detailed counts.

This idea was previously discussed in [1]. Working with the enormous Windows repository, we found that 20+ seconds was being spent in the ahead/behind computation when the current branch was 150K commits behind the upstream branch. (Yes, this happens and only took 3 weeks on the reporter's system.)

I've only modified "git status" in this patch series. A similar change could be added to "git branch -vv" and "git checkout" to avoid delays there too. I avoided doing it here to keep this patch series focused.

[1] https://public-inbox.org/git/030bf57c-7a23-3391-4fc0-93efee791543@jeffhostetler.com/T/

Jeff Hostetler (4):
  status: add --no-ahead-behind to porcelain V2
  stat_tracking_info: return +1 when branch and upstream differ
  status: update short status to use --no-ahead-behind
  status: support --no-ahead-behind in long status format.

 Documentation/config.txt     |  5 +++++
 Documentation/git-status.txt | 16 ++++++++++++++++
 builtin/checkout.c           |  2 +-
 builtin/commit.c             |  6 ++++++
 ref-filter.c                 |  4 ++--
 remote.c                     | 36 ++++++++++++++++++++++++++++--------
 remote.h                     |  4 +++-
 t/t6040-tracking-info.sh     | 42 ++++++++++++++++++++++++++++++++++++++++++
 t/t7064-wtstatus-pv2.sh      | 23 +++++++++++++++++++++++
 wt-status.c                  | 24 ++++++++++++++++++++----
 wt-status.h                  |  1 +
 11 files changed, 147 insertions(+), 16 deletions(-)