Mercurial > hg
view tests/test-relink.t @ 51505:c9ceb4f60256 stable 6.7
phases: avoid N² behavior in `advanceboundary`
We allowed duplicated entries in the deque, which each entry could potentially
insert all its ancestors. So advancing boundary for the full repository would
mean each revision would walk all its ancestors, resulting in O(N²) iteration.
For repository of any decent size, N² is quickly insane.
We introduce a simple set to avoid this and get back to reasonable performance.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Fri, 15 Mar 2024 01:31:57 +0100 |
parents | dcaa2df1f688 |
children |
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#require hardlink $ echo "[extensions]" >> $HGRCPATH $ echo "relink=" >> $HGRCPATH $ fix_path() { > tr '\\' / > } $ cat > arelinked.py <<EOF > import os > import sys > from mercurial import ( > pycompat, > util, > ) > path1, path2 = sys.argv[1:3] > if util.samefile(pycompat.fsencode(path1), pycompat.fsencode(path2)): > print('%s == %s' % (path1, path2)) > else: > print('%s != %s' % (path1, path2)) > EOF create source repository $ hg init repo $ cd repo $ echo a > a $ echo b > b $ hg ci -Am addfile adding a adding b $ cat "$TESTDIR/binfile.bin" >> a $ cat "$TESTDIR/binfile.bin" >> b $ hg ci -Am changefiles make another commit to create files larger than 1 KB to test formatting of final byte count $ cat "$TESTDIR/binfile.bin" >> a $ cat "$TESTDIR/binfile.bin" >> b $ hg ci -m anotherchange don't sit forever trying to double-lock the source repo $ hg relink . relinking $TESTTMP/repo/.hg/store to $TESTTMP/repo/.hg/store there is nothing to relink Test files are read in binary mode $ "$PYTHON" -c "open('.hg/store/data/dummy.i', 'wb').write(b'a\r\nb\n')" $ cd .. clone and pull to break links $ hg clone --pull -r0 repo clone adding changesets adding manifests adding file changes added 1 changesets with 2 changes to 2 files new changesets 008c0c271c47 updating to branch default 2 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cd clone $ hg pull -q $ echo b >> b $ hg ci -m changeb created new head $ "$PYTHON" -c "open('.hg/store/data/dummy.i', 'wb').write(b'a\nb\r\n')" relink #if no-reposimplestore $ hg relink --debug --config progress.debug=true | fix_path relinking $TESTTMP/repo/.hg/store to $TESTTMP/clone/.hg/store tip has 2 files, estimated total number of files: 3 collecting: 00changelog.d 1/3 files (33.33%) collecting: 00changelog.i 2/3 files (66.67%) collecting: 00manifest.i 3/3 files (100.00%) collecting: a.i 4/3 files (133.33%) collecting: b.i 5/3 files (166.67%) collecting: dummy.i 6/3 files (200.00%) collected 6 candidate storage files not linkable: 00changelog.d not linkable: 00changelog.i not linkable: 00manifest.i pruning: data/a.i 4/6 files (66.67%) not linkable: data/b.i pruning: data/dummy.i 6/6 files (100.00%) pruned down to 2 probably relinkable files relinking: data/a.i 1/2 files (50.00%) not linkable: data/dummy.i relinked 1 files (1.36 KB reclaimed) $ cd .. check hardlinks $ "$PYTHON" arelinked.py repo/.hg/store/data/a.i clone/.hg/store/data/a.i repo/.hg/store/data/a.i == clone/.hg/store/data/a.i $ "$PYTHON" arelinked.py repo/.hg/store/data/b.i clone/.hg/store/data/b.i repo/.hg/store/data/b.i != clone/.hg/store/data/b.i #endif