Cache last commit when pushing for big repository

[lunny]

This PR will cache the last commit ids for the home page of big repositories entries when a new commit pushed. Then when you visit the home page first time after a new commit pushed, it should be still fast enough.

Still WIP, wait for a queue since it may spent many times.

Blocked by #10133

[bagasme]

How many commits a repo can be considered big?

[lunny]

@bagasme there is a config, default is 1000 commits.

[stale]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs during the next 2 months. Thank you for your contributions.

[codecov-commenter]

Codecov Report

Merging #10109 into master will decrease coverage by 0.03%.
The diff coverage is 25.64%.

@@            Coverage Diff             @@
##           master   #10109      +/-   ##
==========================================
- Coverage   42.62%   42.58%   -0.04%     
==========================================
  Files         672      673       +1     
  Lines       73785    73855      +70     
==========================================
+ Hits        31448    31450       +2     
- Misses      37247    37296      +49     
- Partials     5090     5109      +19     

Impacted Files	Coverage Δ
modules/repository/cache.go	14.89% <14.89%> (ø)
services/repository/push.go	56.31% <33.33%> (-1.62%)	⬇️
modules/git/commit_info.go	68.18% <100.00%> (ø)
modules/git/notes.go	64.10% <100.00%> (ø)
modules/util/timer.go	42.85% <0.00%> (-42.86%)	⬇️
modules/indexer/stats/db.go	52.17% <0.00%> (-17.40%)	⬇️
models/gpg_key.go	53.33% <0.00%> (-0.58%)	⬇️
models/error.go	34.34% <0.00%> (-0.51%)	⬇️
services/pull/pull.go	40.78% <0.00%> (-0.50%)	⬇️
... and 1 more

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[6543]

@lunny good idear, we only should take care the easy jobs done while pushing should be first (trigger webhooks, calc commit count cache, ..) and the slowest tasks should be add the end

[lunny]

It needs more refactor here. I will send other PRs.

[6543]

CI Failed

[codecov-io]

Codecov Report

Merging #10109 into master will increase coverage by 0.06%.
The diff coverage is 25.64%.

@@            Coverage Diff             @@
##           master   #10109      +/-   ##
==========================================
+ Coverage   42.52%   42.59%   +0.06%     
==========================================
  Files         672      673       +1     
  Lines       73788    73858      +70     
==========================================
+ Hits        31381    31460      +79     
+ Misses      37337    37291      -46     
- Partials     5070     5107      +37     

Impacted Files	Coverage Δ
modules/repository/cache.go	14.89% <14.89%> (ø)
services/repository/push.go	56.31% <33.33%> (-1.62%)	⬇️
modules/git/commit_info.go	68.18% <100.00%> (ø)
modules/git/notes.go	64.10% <100.00%> (ø)
modules/util/timer.go	42.85% <0.00%> (-42.86%)	⬇️
services/pull/check.go	47.69% <0.00%> (-5.39%)	⬇️
services/pull/temp_repo.go	26.59% <0.00%> (-3.20%)	⬇️
models/unit.go	46.57% <0.00%> (-2.74%)	⬇️
services/pull/patch.go	66.37% <0.00%> (-2.59%)	⬇️
modules/process/manager.go	72.50% <0.00%> (-2.50%)	⬇️
... and 15 more

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update f06ee37...f1fca48. Read the comment docs.