Mercurial > hg > mercurial-crew-with-dirclash
view tests/test-tags @ 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 | dbdce3b99988 |
children | fb493241d7f6 |
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#!/bin/sh mkdir t cd t hg init hg id echo a > a hg add a hg commit -m "test" -d "1000000 0" hg co hg identify T=`hg tip -v | head -n 1 | cut -d : -f 3` echo "$T first" > .hgtags cat .hgtags hg add .hgtags hg commit -m "add tags" -d "1000000 0" hg tags hg identify echo bb > a hg status hg identify hg co first hg id hg -v id hg status echo 1 > b hg add b hg commit -m "branch" -d "1000000 0" hg id hg merge 1 hg id hg status hg commit -m "merge" -d "1000000 0" # create fake head, make sure tag not visible afterwards cp .hgtags tags hg tag -d "1000000 0" last hg rm .hgtags hg commit -m "remove" -d "1000000 0" mv tags .hgtags hg add .hgtags hg commit -m "readd" -d "1000000 0" hg tags # invalid tags echo "spam" >> .hgtags echo >> .hgtags echo "foo bar" >> .hgtags echo "$T invalid" | sed "s/..../a5a5/" >> .hg/localtags hg commit -m "tags" -d "1000000 0" # report tag parse error on other head hg up 3 echo 'x y' >> .hgtags hg commit -m "head" -d "1000000 0" hg tags hg tip