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view tests/test-symlinks.t @ 43198:c16fe77e340a
pathcopies: give up any optimization based on `introrev`
Between 8a0136f69027 and d98fb3f42f33, we sped up the search for the
introduction revision during path copies. However, further checking show that
finding the introduction revision is still expensive and that we are better off
without it. So we simply drop it and only rely on the linkrev optimisation.
I ran `perfpathcopies` on 6989 pair of revision in the pypy
repository (`hg perfhelper-pathcopies`. The result is massively in favor of
dropping this condition. The result of the copy tracing are unchanged.
Attempt to use a smaller changes preserving linkrev usage were unsuccessful, it
can return wrong result. The following changesets broke test-mv-cp-st-diff.t
- if not f.isintroducedafter(limit):
+ if limit >= 0 and f.linkrev() < limit:
return None
Here are various numbers (before this changeset/after this changesets)
source destination before after saved-time ratio
worth cases e66f24650daf 695dfb0f493b 1.062843 1.246369 -0.183526 1.172675
c979853a3b6a 8d60fe293e79 1.036985 1.196414 -0.159429 1.153743
22349fa2fc33 fbb1c9fd86c0 0.879926 1.038682 -0.158756 1.180420
682b98f3e672 a4878080a536 0.909952 1.063801 -0.153849 1.169074
5adabc9b9848 920958a93997 0.993622 1.147452 -0.153830 1.154817
worse 1% dbfbfcf077e9 aea8f2fd3593 1.016595 1.082999 -0.066404 1.065320
worse 5% c95f1ced15f2 7d29d5e39734 0.453694 0.471156 -0.017462 1.038488
worse 10% 3e144ed1d5b7 2aef0e942480 0.035140 0.037535 -0.002395 1.068156
worse 25% 321fc60db035 801748ba582a 0.009267 0.009325 -0.000058 1.006259
median 2088ce763fc2 e6991321d78b 0.000665 0.000651 0.000014 0.978947
best 25% 915631a97de6 385b31354be6 0.040743 0.040363 0.000380 0.990673
best 10% ad495c36a765 19c10384d3e7 0.431658 0.411490 0.020168 0.953278
best 5% d13ae7d283ae 813c99f810ac 1.141404 1.075346 0.066058 0.942126
best 1% 81593cb4a496 99ae11866969 1.833297 0.063823 1.769474 0.034813
best cases c3b14617fbd7 743a0fcaa4eb 1101.811740 2.735970 1099.075770 0.002483
c3b14617fbd7 9ba6ab77fd29 1116.753953 2.800729 1113.953224 0.002508
058b99d6e81f 57e249b7a3ea 1246.128485 3.042762 1243.085723 0.002442
9a8c361aab49 0354a250d371 1253.111894 3.085796 1250.026098 0.002463
442dbbc53c68 3ec1002a818c 1261.786294 3.138607 1258.647687 0.002487
As one can see, the average case is not really impacted. However, the worth case
we get after this changeset are much better than the one we had before it. We
have 30 pairs where improvements are above 10 minutes.
This reflect in the combined time for all pairs
before: 26256s
after: 1300s (-95%)
If we remove these pathological 30 cases, we still see a significant improvements:
before: 1631s
after: 1245s (-24%)
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Thu, 10 Oct 2019 03:49:33 +0200 |
parents | 4d2b9b304ad0 |
children | 96ca817ec192 |
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#require symlink == tests added in 0.7 == $ hg init test-symlinks-0.7; cd test-symlinks-0.7; $ touch foo; ln -s foo bar; ln -s nonexistent baz import with add and addremove -- symlink walking should _not_ screwup. $ hg add adding bar adding baz adding foo $ hg forget bar baz foo $ hg addremove adding bar adding baz adding foo commit -- the symlink should _not_ appear added to dir state $ hg commit -m 'initial' $ touch bomb again, symlink should _not_ show up on dir state $ hg addremove adding bomb Assert screamed here before, should go by without consequence $ hg commit -m 'is there a bug?' $ cd .. == fifo & ignore == $ hg init test; cd test; $ mkdir dir $ touch a.c dir/a.o dir/b.o test what happens if we want to trick hg $ hg commit -A -m 0 adding a.c adding dir/a.o adding dir/b.o $ echo "relglob:*.o" > .hgignore $ rm a.c $ rm dir/a.o $ rm dir/b.o $ mkdir dir/a.o $ ln -s nonexistent dir/b.o $ mkfifo a.c it should show a.c, dir/a.o and dir/b.o deleted $ hg status M dir/b.o ! a.c ! dir/a.o ? .hgignore $ hg status a.c a.c: unsupported file type (type is fifo) ! a.c $ cd .. == symlinks from outside the tree == test absolute path through symlink outside repo $ p=`pwd` $ hg init x $ ln -s x y $ cd x $ touch f $ hg add f $ hg status "$p"/y/f A f try symlink outside repo to file inside $ ln -s x/f ../z this should fail $ hg status ../z && { echo hg mistakenly exited with status 0; exit 1; } || : abort: ../z not under root '$TESTTMP/x' $ cd .. == cloning symlinks == $ hg init clone; cd clone; try cloning symlink in a subdir 1. commit a symlink $ mkdir -p a/b/c $ cd a/b/c $ ln -s /path/to/symlink/source demo $ cd ../../.. $ hg stat ? a/b/c/demo $ hg commit -A -m 'add symlink in a/b/c subdir' adding a/b/c/demo 2. clone it $ cd .. $ hg clone clone clonedest updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved == symlink and git diffs == git symlink diff $ cd clonedest $ hg diff --git -r null:tip diff --git a/a/b/c/demo b/a/b/c/demo new file mode 120000 --- /dev/null +++ b/a/b/c/demo @@ -0,0 +1,1 @@ +/path/to/symlink/source \ No newline at end of file $ hg export --git tip > ../sl.diff import git symlink diff $ hg rm a/b/c/demo $ hg commit -m'remove link' $ hg import ../sl.diff applying ../sl.diff $ hg diff --git -r 1:tip diff --git a/a/b/c/demo b/a/b/c/demo new file mode 120000 --- /dev/null +++ b/a/b/c/demo @@ -0,0 +1,1 @@ +/path/to/symlink/source \ No newline at end of file == symlinks and addremove == directory moved and symlinked $ mkdir foo $ touch foo/a $ hg ci -Ama adding foo/a $ mv foo bar $ ln -s bar foo $ hg status ! foo/a ? bar/a ? foo now addremove should remove old files $ hg addremove adding bar/a adding foo removing foo/a commit and update back $ hg ci -mb $ hg up '.^' 1 files updated, 0 files merged, 2 files removed, 0 files unresolved $ hg up tip 2 files updated, 0 files merged, 1 files removed, 0 files unresolved $ cd .. == root of repository is symlinked == $ hg init root $ ln -s root link $ cd root $ echo foo > foo $ hg status ? foo $ hg status ../link ? foo $ hg add foo $ hg cp foo "$TESTTMP/link/bar" foo has not been committed yet, so no copy data will be stored for bar. $ cd .. $ hg init b $ cd b $ ln -s nothing dangling $ hg commit -m 'commit symlink without adding' dangling abort: dangling: file not tracked! [255] $ hg add dangling $ hg commit -m 'add symlink' $ hg tip -v changeset: 0:cabd88b706fc tag: tip user: test date: Thu Jan 01 00:00:00 1970 +0000 files: dangling description: add symlink $ hg manifest --debug 2564acbe54bbbedfbf608479340b359f04597f80 644 @ dangling $ readlink.py dangling dangling -> nothing $ rm dangling $ ln -s void dangling $ hg commit -m 'change symlink' $ readlink.py dangling dangling -> void modifying link $ rm dangling $ ln -s empty dangling $ readlink.py dangling dangling -> empty reverting to rev 0: $ hg revert -r 0 -a reverting dangling $ readlink.py dangling dangling -> nothing backups: $ readlink.py *.orig dangling.orig -> empty $ rm *.orig $ hg up -C 1 files updated, 0 files merged, 0 files removed, 0 files unresolved copies $ hg cp -v dangling dangling2 copying dangling to dangling2 $ hg st -Cmard A dangling2 dangling $ readlink.py dangling dangling2 dangling -> void dangling2 -> void Issue995: hg copy -A incorrectly handles symbolic links $ hg up -C 0 files updated, 0 files merged, 0 files removed, 0 files unresolved $ mkdir dir $ ln -s dir dirlink $ hg ci -qAm 'add dirlink' $ mkdir newdir $ mv dir newdir/dir $ mv dirlink newdir/dirlink $ hg mv -A dirlink newdir/dirlink $ cd ..