revlog: switch to a C version of headrevs
The C implementation is more than 100 times faster than the Python
version (which is still available as a fallback).
In a repo with 330,000 revs and a stale .hg/cache/tags file, this
patch improves the performance of "hg tip" from 2.2 to 1.6 seconds.
# Extension dedicated to test patch.diff() upgrade modes
#
#
from mercurial import scmutil, patch, util
def autodiff(ui, repo, *pats, **opts):
diffopts = patch.diffopts(ui, opts)
git = opts.get('git', 'no')
brokenfiles = set()
losedatafn = None
if git in ('yes', 'no'):
diffopts.git = git == 'yes'
diffopts.upgrade = False
elif git == 'auto':
diffopts.git = False
diffopts.upgrade = True
elif git == 'warn':
diffopts.git = False
diffopts.upgrade = True
def losedatafn(fn=None, **kwargs):
brokenfiles.add(fn)
return True
elif git == 'abort':
diffopts.git = False
diffopts.upgrade = True
def losedatafn(fn=None, **kwargs):
raise util.Abort('losing data for %s' % fn)
else:
raise util.Abort('--git must be yes, no or auto')
node1, node2 = scmutil.revpair(repo, [])
m = scmutil.match(repo[node2], pats, opts)
it = patch.diff(repo, node1, node2, match=m, opts=diffopts,
losedatafn=losedatafn)
for chunk in it:
ui.write(chunk)
for fn in sorted(brokenfiles):
ui.write('data lost for: %s\n' % fn)
cmdtable = {
"autodiff":
(autodiff,
[('', 'git', '', 'git upgrade mode (yes/no/auto/warn/abort)'),
],
'[OPTION]... [FILE]...'),
}