Mercurial > hg
view tests/test-walkrepo.py @ 20713:6a1a4c212d50
revset: improve head revset performance
Previously the head() revset would iterate over every item in the subset and
check if it was a head. Since the subset is often the entire repo, this was
slow on large repos. Now we iterate over each item in the head list and check if
it's in the subset, which results in much less work.
hg log -r 'head()' on a large repo:
Before: 0.95s
After: 0.28s
author | Durham Goode <durham@fb.com> |
---|---|
date | Thu, 13 Mar 2014 13:47:21 -0700 |
parents | 67964cda8701 |
children | fad896292e7d |
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import os from mercurial import hg, ui from mercurial.scmutil import walkrepos from mercurial.util import checklink from os import mkdir, chdir from os.path import join as pjoin u = ui.ui() sym = checklink('.') hg.repository(u, 'top1', create=1) mkdir('subdir') chdir('subdir') hg.repository(u, 'sub1', create=1) mkdir('subsubdir') chdir('subsubdir') hg.repository(u, 'subsub1', create=1) chdir(os.path.pardir) if sym: os.symlink(os.path.pardir, 'circle') os.symlink(pjoin('subsubdir', 'subsub1'), 'subsub1') def runtest(): reposet = frozenset(walkrepos('.', followsym=True)) if sym and (len(reposet) != 3): print "reposet = %r" % (reposet,) print ("Found %d repositories when I should have found 3" % (len(reposet),)) if (not sym) and (len(reposet) != 2): print "reposet = %r" % (reposet,) print ("Found %d repositories when I should have found 2" % (len(reposet),)) sub1set = frozenset((pjoin('.', 'sub1'), pjoin('.', 'circle', 'subdir', 'sub1'))) if len(sub1set & reposet) != 1: print "sub1set = %r" % (sub1set,) print "reposet = %r" % (reposet,) print "sub1set and reposet should have exactly one path in common." sub2set = frozenset((pjoin('.', 'subsub1'), pjoin('.', 'subsubdir', 'subsub1'))) if len(sub2set & reposet) != 1: print "sub2set = %r" % (sub2set,) print "reposet = %r" % (reposet,) print "sub1set and reposet should have exactly one path in common." sub3 = pjoin('.', 'circle', 'top1') if sym and sub3 not in reposet: print "reposet = %r" % (reposet,) print "Symbolic links are supported and %s is not in reposet" % (sub3,) runtest() if sym: # Simulate not having symlinks. del os.path.samestat sym = False runtest()