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bisect: avoid adding irrelevant revisions to bisect state...
bisect: avoid adding irrelevant revisions to bisect state When adding new revisions to the bisect state, it only makes sense to add information about revisions that are under consideration (i.e., those that are topologically between the known good and bad revisions). However, if the user passes in a revset (e.g., '!merge()' to exclude merge commits), hg will resolve the revset first and add all matching revisions to the bisect state (which in this case would likely be the majority of revisions in the repo). To avoid this, revisions should only be added to the bisect state if they are between the good and bad revisions (and therefore relevant to the bisection). -- Here are the results of some performance tests using the `mozilla-central` repo (since it is one of the largest freely-available hg repositories in the wild). These tests compare the performance of a locally-built `hg` before and after application of this series. Note that `--noupdate` is passed to avoid including update time (which should not vary across cases). Setup (run between each test): $ hg bisect --reset $ hg bisect --noupdate --bad 56c3ad4bde5c70714b784ccf15d099e0df0f5bde $ hg bisect --noupdate --good 57426696adaf08298af3027fa77486fee0633b13 Test using a revset that returns a very large number of revisions: $ time hg bisect --noupdate --skip '!merge()' > /dev/null Before: real 0m9.398s user 0m9.233s sys 0m0.120s After: real 0m1.513s user 0m1.425s sys 0m0.052s Test using a revset that is expensive to compute: $ time hg bisect --noupdate --skip 'desc("Bug")' > /dev/null Before: real 0m49.853s user 0m49.580s sys 0m0.243s After: real 0m4.120s user 0m4.036s sys 0m0.048s
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test-excessive-merge.t
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$ hg init
$ echo foo > a
$ echo foo > b
$ hg add a b
$ hg ci -m "test"
$ echo blah > a
$ hg ci -m "branch a"
$ hg co 0
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo blah > b
$ hg ci -m "branch b"
created new head
$ HGMERGE=true hg merge 1
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ hg ci -m "merge b/a -> blah"
$ hg co 1
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ HGMERGE=true hg merge 2
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ hg ci -m "merge a/b -> blah"
created new head
$ hg log
changeset: 4:2ee31f665a86
tag: tip
parent: 1:96155394af80
parent: 2:92cc4c306b19
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: merge a/b -> blah
changeset: 3:e16a66a37edd
parent: 2:92cc4c306b19
parent: 1:96155394af80
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: merge b/a -> blah
changeset: 2:92cc4c306b19
parent: 0:5e0375449e74
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: branch b
changeset: 1:96155394af80
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: branch a
changeset: 0:5e0375449e74
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: test
$ hg debugindex --changelog
rev linkrev nodeid p1-nodeid p2-nodeid
0 0 5e0375449e74 000000000000 000000000000
1 1 96155394af80 5e0375449e74 000000000000
2 2 92cc4c306b19 5e0375449e74 000000000000
3 3 e16a66a37edd 92cc4c306b19 96155394af80
4 4 2ee31f665a86 96155394af80 92cc4c306b19
revision 1
$ hg manifest --debug 1
79d7492df40aa0fa093ec4209be78043c181f094 644 a
2ed2a3912a0b24502043eae84ee4b279c18b90dd 644 b
revision 2
$ hg manifest --debug 2
2ed2a3912a0b24502043eae84ee4b279c18b90dd 644 a
79d7492df40aa0fa093ec4209be78043c181f094 644 b
revision 3
$ hg manifest --debug 3
79d7492df40aa0fa093ec4209be78043c181f094 644 a
79d7492df40aa0fa093ec4209be78043c181f094 644 b
revision 4
$ hg manifest --debug 4
79d7492df40aa0fa093ec4209be78043c181f094 644 a
79d7492df40aa0fa093ec4209be78043c181f094 644 b
$ hg debugindex a
rev linkrev nodeid p1-nodeid p2-nodeid
0 0 2ed2a3912a0b 000000000000 000000000000
1 1 79d7492df40a 2ed2a3912a0b 000000000000
$ hg verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
checked 5 changesets with 4 changes to 2 files