[Haskell-cafe] Re: [darcs-devel] announcing darcs 2.0.0pre2
droundy at darcs.net
Thu Jan 3 12:09:25 EST 2008
On Thu, Jan 03, 2008 at 11:11:40AM +0000, Simon Marlow wrote:
> David Roundy wrote:
> > Anyhow, could you retry this test with the above change in methodology, and
> > let me know if (a) the pull is still slow the first time and (b) if it's
> > much faster the second time (after the reverse unpull/pull)?
> I think I've done it in both directions now, and it got faster, but still
> much slower than darcs1:
> $ time darcs2 unpull --from-tag 2007-09-25 -a
> Finished unpulling.
> 58.68s real 50.64s user 6.36s system 97% darcs2 unpull --from-tag
> 2007-09-25 -a
> $ time darcs2 pull -a ../ghc-darcs2
> Pulling from "../ghc-darcs2"...
> Finished pulling and applying.
> 53.28s real 44.62s user 7.10s system 97% darcs2 pull -a ../ghc-darcs2
> This is still an order of magnitude slower than darcs1 for the same
> operation. (these times are now on the local filesystem, BTW)
Is this with the latest darcs-unstable? I made some improvements shortly
before Christmas (or was it after Christmas?) that ought to improve the
speed of pulls dramatically. We were doing O(N^2) operations in our
handling of "pending" changes, which I fixed (I think). So I'll wait on
investigating this until you've confirmed which version this was tested
with. And thanks for the testing!
Department of Physics
Oregon State University
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