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Re: best practices against long git rebase times?

From
Junio C Hamano <gitster@pobox.com>
Date
Dec 7, 2015, 22:56 UTC
Message-ID
<xmqqmvtllvfi.fsf@gitster.mtv.corp.google.com>
In-Reply-To
<20151207210212.GF30203@sigill.intra.peff.net>
Jeff King <peff@peff.net> writes:
Show 16 quoted lines
> You're computing the patch against the parent for each of those 3000
> commits (to get a hash of it to compare against the single hash on the
> other side). Twelve minutes sounds long, but if you have a really
> gigantic tree, it might not be unreasonable.
>
> You can also try compiling with "make XDL_FAST_HASH=" (i.e., setting
> that option to the empty string). Last year I found there were some
> pretty suboptimal corner cases, and you may be hitting one (we should
> probably turn that option off by default; I got stuck on trying to find
> a hash that would perform faster and never followed up[1].
>
> I doubt that is your problem, but it's possible).
>
> -Peff
>
> [1] http://thread.gmane.org/gmane.comp.version-control.git/261638

I vaguely recall having discussed caching the patch-ids somewhere so that this does not have to be done every time. Would such an extension help here, I wonder?

Previous: Jeff KingNext: Jeff King
Message 5 of 13 in “best practices against long git rebase times?”
  1. Andreas KreyDec 4, 2015
  2. John KeepingDec 4, 2015
  3. Andreas KreyDec 6, 2015
  4. Jeff KingDec 7, 2015
  5. Junio C HamanoDec 7, 2015
  6. Jeff KingDec 7, 2015
  7. Junio C HamanoDec 8, 2015
  8. Christian CouderDec 8, 2015
  9. demerphqDec 4, 2015
  10. John KeepingDec 4, 2015
  11. demerphqDec 4, 2015
  12. Stefan BellerDec 4, 2015
  13. Andreas KreyDec 6, 2015

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