dirstate.walk: don't keep track of normalized files in parallel
Rev 2bb13f2b778c changed the semantics of the work list to store (normalized,
non-normalized) pairs. All the tuple creation and destruction hurts perf: on a
large repo on OS X, 'hg status' went from 3.62 seconds to 3.78.
It also is unnecessary in most cases:
- it is clearly unnecessary on case-sensitive filesystems.
- it is also unnecessary when filenames have been read off of disk rather than
being supplied by the user.
The only case where the non-normalized case is required at all is when the file
is unknown.
To eliminate most of the perf cost, keep trace of whether the directory needs
to be normalized at all with a boolean called 'alreadynormed'. Pay the cost of
directory normalization only when necessary.
For the above large repo, 'hg status' goes to 3.63 seconds.
This emulates the effects of an hg pull --rebase in which the remote repo
already has one local mq patch
$ cat >> $HGRCPATH <<EOF
> [extensions]
> rebase=
> mq=
>
> [phases]
> publish=False
>
> [alias]
> tglog = log -G --template "{rev}: '{desc}' tags: {tags}\n"
> EOF
$ hg init a
$ cd a
$ hg qinit -c
$ echo c1 > c1
$ hg add c1
$ hg ci -m C1
$ echo r1 > r1
$ hg add r1
$ hg ci -m R1
$ hg up -q 0
$ hg qnew p0.patch -d '1 0'
$ echo p0 > p0
$ hg add p0
$ hg qref -m P0
$ hg qnew p1.patch -d '2 0'
$ echo p1 > p1
$ hg add p1
$ hg qref -m P1
$ hg export qtip > p1.patch
$ hg up -q -C 1
$ hg import p1.patch
applying p1.patch
$ rm p1.patch
$ hg up -q -C qtip
$ hg rebase -v
rebasing 2:13a46ce44f60 "P0" (p0.patch qbase)
resolving manifests
removing p0
getting r1
resolving manifests
getting p0
committing files:
p0
committing manifest
committing changelog
rebasing 3:148775c71080 "P1" (p1.patch qtip)
resolving manifests
note: rebase of 3:148775c71080 created no changes to commit
rebase merging completed
updating mq patch p0.patch to 5:9ecc820b1737
$TESTTMP/a/.hg/patches/p0.patch (glob)
2 changesets found
uncompressed size of bundle content:
344 (changelog)
284 (manifests)
109 p0
109 p1
saved backup bundle to $TESTTMP/a/.hg/strip-backup/13a46ce44f60-5da6ecfb-backup.hg (glob)
2 changesets found
uncompressed size of bundle content:
399 (changelog)
284 (manifests)
109 p0
109 p1
adding branch
adding changesets
adding manifests
adding file changes
added 2 changesets with 2 changes to 2 files
rebase completed
1 revisions have been skipped
$ hg tglog
@ 3: 'P0' tags: p0.patch qbase qtip tip
|
o 2: 'P1' tags: qparent
|
o 1: 'R1' tags:
|
o 0: 'C1' tags:
$ cd ..
$ hg init b
$ cd b
$ hg qinit -c
$ for i in r0 r1 r2 r3 r4 r5 r6;
> do
> echo $i > $i
> hg ci -Am $i
> done
adding r0
adding r1
adding r2
adding r3
adding r4
adding r5
adding r6
$ hg qimport -r 1:tip
$ hg up -q 0
$ for i in r1 r3 r7 r8;
> do
> echo $i > $i
> hg ci -Am branch2-$i
> done
adding r1
created new head
adding r3
adding r7
adding r8
$ echo somethingelse > r4
$ hg ci -Am branch2-r4
adding r4
$ echo r6 > r6
$ hg ci -Am branch2-r6
adding r6
$ hg up -q qtip
$ HGMERGE=internal:fail hg rebase
rebasing 1:b4bffa6e4776 "r1" (1.diff qbase)
note: rebase of 1:b4bffa6e4776 created no changes to commit
rebasing 2:c0fd129beb01 "r2" (2.diff)
rebasing 3:6ff5b8feed8e "r3" (3.diff)
note: rebase of 3:6ff5b8feed8e created no changes to commit
rebasing 4:094320fec554 "r4" (4.diff)
unresolved conflicts (see hg resolve, then hg rebase --continue)
[1]
$ HGMERGE=internal:local hg resolve --all
(no more unresolved files)
$ hg rebase --continue
already rebased 1:b4bffa6e4776 "r1" (1.diff qbase) as 057f55ff8f44
already rebased 2:c0fd129beb01 "r2" (2.diff) as 1660ab13ce9a
already rebased 3:6ff5b8feed8e "r3" (3.diff) as 1660ab13ce9a
rebasing 4:094320fec554 "r4" (4.diff)
note: rebase of 4:094320fec554 created no changes to commit
rebasing 5:681a378595ba "r5" (5.diff)
rebasing 6:512a1f24768b "r6" (6.diff qtip)
note: rebase of 6:512a1f24768b created no changes to commit
saved backup bundle to $TESTTMP/b/.hg/strip-backup/b4bffa6e4776-b9bfb84d-backup.hg (glob)
$ hg tglog
@ 8: 'r5' tags: 5.diff qtip tip
|
o 7: 'r2' tags: 2.diff qbase
|
o 6: 'branch2-r6' tags: qparent
|
o 5: 'branch2-r4' tags:
|
o 4: 'branch2-r8' tags:
|
o 3: 'branch2-r7' tags:
|
o 2: 'branch2-r3' tags:
|
o 1: 'branch2-r1' tags:
|
o 0: 'r0' tags:
$ cd ..