Mercurial > hg
view hgext/record.py @ 26945:8a256cee72c8 stable
tags: create new sortdict for performance reasons
sortdict internally maintains a list of keys in insertion order. When a
key is replaced via __setitem__, we .remove() from this list. This
involves a linear scan and array adjustment. This is an expensive
operation.
The tags reading code was calling into sortdict.__setitem__ for each tag
in a read .hgtags revision. For repositories with thousands of tags or
thousands of .hgtags revisions, the overhead from list.remove()
noticeable.
This patch creates a new sortdict() so __setitem__ calls don't incur a
list.remove.
This doesn't appear to have any performance impact on my Firefox
repository. But that's only because tags reading doesn't show up in
profiles to begin with. I'm still waiting to hear from a user with over
10,000 tags and hundreds of heads on the impact of this patch.
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Thu, 12 Nov 2015 13:16:04 -0800 |
parents | 56b2bcea2529 |
children | 44ffbb2a4f59 |
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# record.py # # Copyright 2007 Bryan O'Sullivan <bos@serpentine.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. '''commands to interactively select changes for commit/qrefresh''' from mercurial.i18n import _ from mercurial import cmdutil, commands, extensions from mercurial import error cmdtable = {} command = cmdutil.command(cmdtable) # Note for extension authors: ONLY specify testedwith = 'internal' for # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should # be specifying the version(s) of Mercurial they are tested with, or # leave the attribute unspecified. testedwith = 'internal' @command("record", # same options as commit + white space diff options [c for c in commands.table['^commit|ci'][1][:] if c[1] != "interactive"] + commands.diffwsopts, _('hg record [OPTION]... [FILE]...')) def record(ui, repo, *pats, **opts): '''interactively select changes to commit If a list of files is omitted, all changes reported by :hg:`status` will be candidates for recording. See :hg:`help dates` for a list of formats valid for -d/--date. You will be prompted for whether to record changes to each modified file, and for files with multiple changes, for each change to use. For each query, the following responses are possible:: y - record this change n - skip this change e - edit this change manually s - skip remaining changes to this file f - record remaining changes to this file d - done, skip remaining changes and files a - record all changes to all remaining files q - quit, recording no changes ? - display help This command is not available when committing a merge.''' if not ui.interactive(): raise error.Abort(_('running non-interactively, use %s instead') % 'commit') opts["interactive"] = True backup = ui.backupconfig('experimental', 'crecord') try: ui.setconfig('experimental', 'crecord', False, 'record') commands.commit(ui, repo, *pats, **opts) finally: ui.restoreconfig(backup) def qrefresh(origfn, ui, repo, *pats, **opts): if not opts['interactive']: return origfn(ui, repo, *pats, **opts) mq = extensions.find('mq') def committomq(ui, repo, *pats, **opts): # At this point the working copy contains only changes that # were accepted. All other changes were reverted. # We can't pass *pats here since qrefresh will undo all other # changed files in the patch that aren't in pats. mq.refresh(ui, repo, **opts) # backup all changed files cmdutil.dorecord(ui, repo, committomq, None, True, cmdutil.recordfilter, *pats, **opts) # This command registration is replaced during uisetup(). @command('qrecord', [], _('hg qrecord [OPTION]... PATCH [FILE]...'), inferrepo=True) def qrecord(ui, repo, patch, *pats, **opts): '''interactively record a new patch See :hg:`help qnew` & :hg:`help record` for more information and usage. ''' return _qrecord('qnew', ui, repo, patch, *pats, **opts) def _qrecord(cmdsuggest, ui, repo, patch, *pats, **opts): try: mq = extensions.find('mq') except KeyError: raise error.Abort(_("'mq' extension not loaded")) repo.mq.checkpatchname(patch) def committomq(ui, repo, *pats, **opts): opts['checkname'] = False mq.new(ui, repo, patch, *pats, **opts) backup = ui.backupconfig('experimental', 'crecord') try: ui.setconfig('experimental', 'crecord', False, 'record') cmdutil.dorecord(ui, repo, committomq, cmdsuggest, False, cmdutil.recordfilter, *pats, **opts) finally: ui.restoreconfig(backup) def qnew(origfn, ui, repo, patch, *args, **opts): if opts['interactive']: return _qrecord(None, ui, repo, patch, *args, **opts) return origfn(ui, repo, patch, *args, **opts) def uisetup(ui): try: mq = extensions.find('mq') except KeyError: return cmdtable["qrecord"] = \ (qrecord, # same options as qnew, but copy them so we don't get # -i/--interactive for qrecord and add white space diff options mq.cmdtable['^qnew'][1][:] + commands.diffwsopts, _('hg qrecord [OPTION]... PATCH [FILE]...')) _wrapcmd('qnew', mq.cmdtable, qnew, _("interactively record a new patch")) _wrapcmd('qrefresh', mq.cmdtable, qrefresh, _("interactively select changes to refresh")) def _wrapcmd(cmd, table, wrapfn, msg): entry = extensions.wrapcommand(table, cmd, wrapfn) entry[1].append(('i', 'interactive', None, msg))