Jeff King <p...@peff.net> writes:

> 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?
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