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Re: Git Scaling: What factors most affect Git performance for a large repo?

From
Junio C Hamano <gitster@pobox.com>
Date
Feb 20, 2015, 21:04 UTC
Message-ID
<xmqqa908z44h.fsf@gitster.dls.corp.google.com>
In-Reply-To
<CACBZZX45eCo6YS4EpHvMQjN32+-w5BztfoLiwh_rJTs7FydgoQ@mail.gmail.com>
Ævar Arnfjörð Bjarmason <avarab@gmail.com> writes:
Show 8 quoted lines
> I actually ran this a few times while testing it, so this is a before
> and after on a hot cache of linux.git with 406 tags v.s. ~140k. I ran
> the gc + repack + bitmaps for both repos noted in an earlier reply of
> mine, and took the fastest run out of 3:
>
>     $ time (git log master -100 >/dev/null)
>     Before: real    0m0.021s
>     After: real    0m2.929s

Do you force --decorate with some config? Or do you see similar performance difference with "git rev-parse master", too?

>     $ time (git status >/dev/null)
>     # Around 150ms, no noticeable difference

This is understandable, as it will not look at any ref other than HEAD.

Previous: Ævar Arnfjörð BjarmasonNext: Ævar Arnfjörð Bjarmason
Message 10 of 28 in “Git Scaling: What factors most affect Git performance for a large repo?”
  1. Stephen MortonFeb 19, 2015
  2. Stefan BellerFeb 19, 2015
  3. Stephen MortonFeb 19, 2015
  4. Stefan BellerFeb 19, 2015
  5. Ævar Arnfjörð BjarmasonFeb 19, 2015
  6. Duy NguyenFeb 20, 2015
  7. Ævar Arnfjörð BjarmasonFeb 20, 2015
  8. Ævar Arnfjörð BjarmasonFeb 20, 2015
  9. Ævar Arnfjörð BjarmasonFeb 20, 2015
  10. Junio C HamanoFeb 20, 2015
  11. Ævar Arnfjörð BjarmasonMar 2, 2015
  12. Junio C HamanoMar 2, 2015
  13. Sebastian SchuberthFeb 20, 2015
  14. Michael HaggertyFeb 24, 2015
  15. Ævar Arnfjörð BjarmasonMar 2, 2015
  16. Duy NguyenFeb 21, 2015
  17. Duy NguyenFeb 19, 2015
  18. David TurnerFeb 20, 2015
  19. Junio C HamanoFeb 20, 2015
  20. David TurnerFeb 23, 2015
  21. Duy NguyenFeb 21, 2015
  22. Duy NguyenFeb 25, 2015
  23. brian m. carlsonFeb 20, 2015
  24. Stephen MortonFeb 20, 2015
  25. Matthieu MoyFeb 20, 2015
  26. brian m. carlsonFeb 20, 2015
  27. Sebastian SchuberthFeb 20, 2015
  28. brian m. carlsonFeb 20, 2015

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