Mercurial > hg > mercurial-crew-with-dirclash
view tests/test-pull-pull-corruption @ 2577:fa76c5d609c9
bdiff: improve worst case behavior by 100x.
on 5.8MB (244.000 lines) text file with similar lines, hash before
this change made diff against empty file take 75 seconds. this change
improves performance to 0.6 seconds. result is that clone of smallish
repo (137MB) with some files like this takes 1 minute instead of 10
minutes.
common case of diff is 10% slower now, probably because of worse cache
locality. but diff does not affect overall performance in common case
(less than 1% of runtime is in diff when it is working ok), so this
tradeoff looks good.
author | Vadim Gelfer <vadim.gelfer@gmail.com> |
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date | Fri, 07 Jul 2006 15:02:55 -0700 |
parents | 81ca1a9bd061 |
children |
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#!/bin/sh # # Corrupt an hg repo with two pulls. # # create one repo with a long history hg init source1 cd source1 touch foo hg add foo for i in 1 2 3 4 5 6 7 8 9 10; do echo $i >> foo hg ci -m $i done cd .. # create one repo with a shorter history hg clone -r 0 source1 source2 cd source2 echo a >> foo hg ci -m a cd .. # create a third repo to pull both other repos into it hg init corrupted cd corrupted # use a hook to make the second pull start while the first one is still running echo '[hooks]' >> .hg/hgrc echo 'prechangegroup = sleep 5' >> .hg/hgrc # start a pull... hg pull ../source1 & # ... and start another pull before the first one has finished sleep 1 hg pull ../source2 2>/dev/null # see the result wait hg verify