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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 $ hg bisect --noupdate --good 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

Martin von Zweigbergk - - Load All Authors

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      https://bz.mercurial-scm.org/672

      # 0-2-4

      #  \ \ \

      #   1-3-5

      #

      # rename in #1, content change in #4.

        $ hg init

        $ touch 1

        $ touch 2

        $ hg commit -Am init  # 0

        adding 1

        adding 2

        $ hg rename 1 1a

        $ hg commit -m rename # 1

        $ hg co -C 0

        1 files updated, 0 files merged, 1 files removed, 0 files unresolved

        $ echo unrelated >> 2

        $ hg ci -m unrelated1 # 2

        created new head

        $ hg merge --debug 1

          unmatched files in other:

           1a

          all copies found (* = to merge, ! = divergent, % = renamed and deleted):

           on remote side:

            src: '1' -> dst: '1a' 

          checking for directory renames

        resolving manifests

         branchmerge: True, force: False, partial: False

         ancestor: 81f4b099af3d, local: c64f439569a9+, remote: c12dcd37c90a

         1: other deleted -> r

        removing 1

         1a: remote created -> g

        getting 1a

        1 files updated, 0 files merged, 1 files removed, 0 files unresolved

        (branch merge, don't forget to commit)

        $ hg ci -m merge1 # 3

        $ hg co -C 2

        1 files updated, 0 files merged, 1 files removed, 0 files unresolved

        $ echo hello >> 1

        $ hg ci -m unrelated2 # 4

        created new head

        $ hg co -C 3

        1 files updated, 0 files merged, 1 files removed, 0 files unresolved

        $ hg merge -y --debug 4

          unmatched files in local:

           1a

          all copies found (* = to merge, ! = divergent, % = renamed and deleted):

           on local side:

            src: '1' -> dst: '1a' *

          checking for directory renames

        resolving manifests

         branchmerge: True, force: False, partial: False

         ancestor: c64f439569a9, local: f4a9cff3cd0b+, remote: 746e9549ea96

        starting 4 threads for background file closing (?)

         preserving 1a for resolve of 1a

         1a: local copied/moved from 1 -> m

        picked tool ':merge' for 1a (binary False symlink False changedelete False)

        merging 1a and 1 to 1a

        my 1a@f4a9cff3cd0b+ other 1@746e9549ea96 ancestor 1@c64f439569a9

         premerge successful

        0 files updated, 1 files merged, 0 files removed, 0 files unresolved

        (branch merge, don't forget to commit)

        $ hg co -C 4

        1 files updated, 0 files merged, 1 files removed, 0 files unresolved

        $ hg merge -y --debug 3

          unmatched files in other:

           1a

          all copies found (* = to merge, ! = divergent, % = renamed and deleted):

           on remote side:

            src: '1' -> dst: '1a' *

          checking for directory renames

        resolving manifests

         branchmerge: True, force: False, partial: False

         ancestor: c64f439569a9, local: 746e9549ea96+, remote: f4a9cff3cd0b

        starting 4 threads for background file closing (?)

         preserving 1 for resolve of 1a

        removing 1

         1a: remote moved from 1 -> m

        picked tool ':merge' for 1a (binary False symlink False changedelete False)

        merging 1 and 1a to 1a

        my 1a@746e9549ea96+ other 1a@f4a9cff3cd0b ancestor 1@c64f439569a9

         premerge successful

        0 files updated, 1 files merged, 0 files removed, 0 files unresolved

        (branch merge, don't forget to commit)

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				https://bz.mercurial-scm.org/672

				# 0-2-4
				# \ \ \
				# 1-3-5
				#
				# rename in #1, content change in #4.

				$ hg init

				$ touch 1
				$ touch 2
				$ hg commit -Am init # 0
				adding 1
				adding 2

				$ hg rename 1 1a
				$ hg commit -m rename # 1

				$ hg co -C 0
				1 files updated, 0 files merged, 1 files removed, 0 files unresolved

				$ echo unrelated >> 2
				$ hg ci -m unrelated1 # 2
				created new head

				$ hg merge --debug 1
				unmatched files in other:
				1a
				all copies found (* = to merge, ! = divergent, % = renamed and deleted):
				on remote side:
				src: '1' -> dst: '1a'
				checking for directory renames
				resolving manifests
				branchmerge: True, force: False, partial: False
				ancestor: 81f4b099af3d, local: c64f439569a9+, remote: c12dcd37c90a
				1: other deleted -> r
				removing 1
				1a: remote created -> g
				getting 1a
				1 files updated, 0 files merged, 1 files removed, 0 files unresolved
				(branch merge, don't forget to commit)

				$ hg ci -m merge1 # 3

				$ hg co -C 2
				1 files updated, 0 files merged, 1 files removed, 0 files unresolved

				$ echo hello >> 1
				$ hg ci -m unrelated2 # 4
				created new head

				$ hg co -C 3
				1 files updated, 0 files merged, 1 files removed, 0 files unresolved

				$ hg merge -y --debug 4
				unmatched files in local:
				1a
				all copies found (* = to merge, ! = divergent, % = renamed and deleted):
				on local side:
				src: '1' -> dst: '1a' *
				checking for directory renames
				resolving manifests
				branchmerge: True, force: False, partial: False
				ancestor: c64f439569a9, local: f4a9cff3cd0b+, remote: 746e9549ea96
				starting 4 threads for background file closing (?)
				preserving 1a for resolve of 1a
				1a: local copied/moved from 1 -> m
				picked tool ':merge' for 1a (binary False symlink False changedelete False)
				merging 1a and 1 to 1a
				my 1a@f4a9cff3cd0b+ other 1@746e9549ea96 ancestor 1@c64f439569a9
				premerge successful
				0 files updated, 1 files merged, 0 files removed, 0 files unresolved
				(branch merge, don't forget to commit)

				$ hg co -C 4
				1 files updated, 0 files merged, 1 files removed, 0 files unresolved

				$ hg merge -y --debug 3
				unmatched files in other:
				1a
				all copies found (* = to merge, ! = divergent, % = renamed and deleted):
				on remote side:
				src: '1' -> dst: '1a' *
				checking for directory renames
				resolving manifests
				branchmerge: True, force: False, partial: False
				ancestor: c64f439569a9, local: 746e9549ea96+, remote: f4a9cff3cd0b
				starting 4 threads for background file closing (?)
				preserving 1 for resolve of 1a
				removing 1
				1a: remote moved from 1 -> m
				picked tool ':merge' for 1a (binary False symlink False changedelete False)
				merging 1 and 1a to 1a
				my 1a@746e9549ea96+ other 1a@f4a9cff3cd0b ancestor 1@c64f439569a9
				premerge successful
				0 files updated, 1 files merged, 0 files removed, 0 files unresolved
				(branch merge, don't forget to commit)