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view hgext/record.py @ 42743:8c9a6adec67a
rust-discovery: using the children cache in add_missing
The DAG range computation often needs to get back to very old
revisions, and turns out to be disproportionately long, given
that the end goal is to remove the descendents of the given
missing revisons from the undecided set.
The fast iteration capabilities available in the Rust case make
it possible to avoid the DAG range entirely, at the cost of
precomputing the children cache, and to simply iterate on
children of the given missing revisions.
This is a case where staying on the same side of the interface
between the two languages has clear benefits.
On discoveries with initial undecided sets
small enough to bypass sampling entirely, the total cost of
computing the children cache and the subsequent iteration
becomes better than the Python + C counterpart, which relies on
reachableroots2.
For example, on a repo with more than one million revisions with
an initial undecided set of 11 elements, we get these figures:
Rust version with simple iteration
addcommons: 57.287us
first undecided computation: 184.278334ms
first children cache computation: 131.056us
addmissings iteration: 42.766us
first addinfo total: 185.24 ms
Python + C version
first addcommons: 0.29 ms
addcommons 0.21 ms
first undecided computation 191.35 ms
addmissings 45.75 ms
first addinfo total: 237.77 ms
On discoveries with large undecided sets, the initial price paid
makes the first addinfo slower than the Python + C version,
but that's more than compensated by the gain in sampling and
subsequent iterations.
Here's an extreme example with an undecided set of a million revisions:
Rust version:
first undecided computation: 293.842629ms
first children cache computation: 407.911297ms
addmissings iteration: 34.312869ms
first addinfo total: 776.02 ms
taking initial sample
query 2: sampling time: 1318.38 ms
query 2; still undecided: 1005013, sample size is: 200
addmissings: 143.062us
Python + C version:
first undecided computation 298.13 ms
addmissings 80.13 ms
first addinfo total: 399.62 ms
taking initial sample
query 2: sampling time: 3957.23 ms
query 2; still undecided: 1005013, sample size is: 200
addmissings 52.88 ms
Differential Revision: https://phab.mercurial-scm.org/D6428
author | Georges Racinet <georges.racinet@octobus.net> |
---|---|
date | Tue, 16 Apr 2019 01:16:39 +0200 |
parents | 4d21ebc4cb47 |
children | 2372284d9457 |
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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 (DEPRECATED) The feature provided by this extension has been moved into core Mercurial as :hg:`commit --interactive`.''' from __future__ import absolute_import from mercurial.i18n import _ from mercurial import ( cmdutil, commands, error, extensions, registrar, ) cmdtable = {} command = registrar.command(cmdtable) # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' 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 = 'ships-with-hg-core' @command("record", # same options as commit + white space diff options [c for c in commands.table['commit|ci'][1][:] if c[1] != "interactive"] + cmdutil.diffwsopts, _('hg record [OPTION]... [FILE]...'), helpcategory=command.CATEGORY_COMMITTING) 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. If using the text interface (see :hg:`help config`), 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[r"interactive"] = True overrides = {('experimental', 'crecord'): False} with ui.configoverride(overrides, 'record'): return commands.commit(ui, repo, *pats, **opts) def qrefresh(origfn, ui, repo, *pats, **opts): if not opts[r'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]...'), helpcategory=command.CATEGORY_COMMITTING, 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[r'checkname'] = False mq.new(ui, repo, patch, *pats, **opts) overrides = {('experimental', 'crecord'): False} with ui.configoverride(overrides, 'record'): cmdutil.checkunfinished(repo) cmdutil.dorecord(ui, repo, committomq, cmdsuggest, False, cmdutil.recordfilter, *pats, **opts) def qnew(origfn, ui, repo, patch, *args, **opts): if opts[r'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][:] + cmdutil.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))