Mercurial > hg > mercurial-crew-with-dirclash
view tests/test-walk @ 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> |
---|---|
date | Fri, 07 Jul 2006 15:02:55 -0700 |
parents | df8416346bb7 |
children | 01c4ea5e788c c93562fb12cc |
line wrap: on
line source
#!/bin/sh mkdir t cd t hg init mkdir -p beans for b in kidney navy turtle borlotti black pinto; do echo $b > beans/$b done mkdir -p mammals/Procyonidae for m in cacomistle coatimundi raccoon; do echo $m > mammals/Procyonidae/$m done echo skunk > mammals/skunk echo fennel > fennel echo fenugreek > fenugreek echo fiddlehead > fiddlehead echo glob:glob > glob:glob hg addremove hg commit -m "commit #0" -d "1000000 0" hg debugwalk cd mammals hg debugwalk . hg debugwalk Procyonidae cd Procyonidae hg debugwalk . hg debugwalk .. cd .. hg debugwalk ../beans hg debugwalk . hg debugwalk .hg hg debugwalk ../.hg cd .. hg debugwalk -Ibeans hg debugwalk 'glob:mammals/../beans/b*' hg debugwalk '-X*/Procyonidae' mammals hg debugwalk path:mammals hg debugwalk .. hg debugwalk beans/../.. hg debugwalk .hg hg debugwalk beans/../.hg hg debugwalk beans/../.hg/data hg debugwalk beans/.hg # Don't know how to test absolute paths without always getting a false # error. #hg debugwalk `pwd`/beans #hg debugwalk `pwd`/.. hg debugwalk glob:\* hg debugwalk 're:.*[kb]$' hg debugwalk path:beans/black hg debugwalk beans 'glob:beans/*' hg debugwalk 'glob:j*' hg debugwalk NOEXIST mkfifo fifo hg debugwalk fifo rm fenugreek hg debugwalk fenugreek hg rm fenugreek hg debugwalk fenugreek touch new hg debugwalk new