Mercurial > hg
view hgext/children.py @ 44861:065421e12248
files: speed up `hg files` when no flags change display
It's not the first time I see slowness from this command slow down
tools built on top of hg.
The majority of the time is spent merely printing the result before
this change, which is clearly not how it should be (especially since
the computation of the result also looks slow).
Running `hg files` in mozilla-central:
parent revision: 1,260s
this commit: 0,683s
this commit without batching ui.write: 0,931s
this commit replacing the body of the loop with `pass`: 0,566s
This looks like a prime candidate for a rust fast path, but until
then, it seems reasonable to optimize the python.
Differential Revision: https://phab.mercurial-scm.org/D8586
author | Valentin Gatien-Baron <valentin.gatienbaron@gmail.com> |
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date | Tue, 26 May 2020 08:15:09 -0400 |
parents | 687b865b95ad |
children | 5105a9975407 |
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# Mercurial extension to provide the 'hg children' command # # Copyright 2007 by Intevation GmbH <intevation@intevation.de> # # Author(s): # Thomas Arendsen Hein <thomas@intevation.de> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. '''command to display child changesets (DEPRECATED) This extension is deprecated. You should use :hg:`log -r "children(REV)"` instead. ''' from __future__ import absolute_import from mercurial.i18n import _ from mercurial import ( cmdutil, logcmdutil, pycompat, registrar, scmutil, ) templateopts = cmdutil.templateopts 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 = b'ships-with-hg-core' @command( b'children', [ ( b'r', b'rev', b'.', _(b'show children of the specified revision'), _(b'REV'), ), ] + templateopts, _(b'hg children [-r REV] [FILE]'), helpcategory=command.CATEGORY_CHANGE_NAVIGATION, inferrepo=True, ) def children(ui, repo, file_=None, **opts): """show the children of the given or working directory revision Print the children of the working directory's revisions. If a revision is given via -r/--rev, the children of that revision will be printed. If a file argument is given, revision in which the file was last changed (after the working directory revision or the argument to --rev if given) is printed. Please use :hg:`log` instead:: hg children => hg log -r "children(.)" hg children -r REV => hg log -r "children(REV)" See :hg:`help log` and :hg:`help revsets.children`. """ opts = pycompat.byteskwargs(opts) rev = opts.get(b'rev') ctx = scmutil.revsingle(repo, rev) if file_: fctx = repo.filectx(file_, changeid=ctx.rev()) childctxs = [fcctx.changectx() for fcctx in fctx.children()] else: childctxs = ctx.children() displayer = logcmdutil.changesetdisplayer(ui, repo, opts) for cctx in childctxs: displayer.show(cctx) displayer.close()