From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#18522: 24.4.50; mapcar is very slow Date: Mon, 22 Feb 2016 22:56:43 +0200 Message-ID: <83h9h0jwfo.fsf@gnu.org> References: <8738bkdjqg.fsf@micropit.roche-blanche.homenet.org> <877fvli0qt.fsf@building.gnus.org> <87bnkb1n9w.fsf@roche-blanche.net> <87wpqh9gm3.fsf@gnus.org> <87io1nnx88.fsf@roche-blanche.net> <87vb5l8en7.fsf@gnus.org> <83wpq1rt5o.fsf@gnu.org> <8737so5neo.fsf@gnus.org> <831t87re7a.fsf@gnu.org> <87bn7b3hnz.fsf@roche-blanche.net> <83lh6fpv4z.fsf@gnu.org> <87h9h2xr9k.fsf@roche-blanche.net> <56C99AD0.2000309@gmx.at> <87wppywbaz.fsf@roche-blanche.net> <87d1rquo4a.fsf@roche-blanche.net> <878u2eun9o.fsf@roche-blanche.net> <834md2niqt.fsf@gnu.org> <87k2lyszy2.fsf@roche-blanche.net> <83bn79n66p.fsf@gnu.org> <87vb5hry9y.fsf@roche-blanche.net> <83r3g4lnor.fsf@gnu.org> <87r3g4o4uw.fsf@roche-blanche.net> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; 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Mon, 22 Feb 2016 15:56:51 -0500 In-reply-to: <87r3g4o4uw.fsf@roche-blanche.net> (message from Peter =?UTF-8?Q?M=C3=BCnster?= on Mon, 22 Feb 2016 21:41:11 +0100) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:113494 Archived-At: > From: Peter Münster > Cc: rudalics@gmx.at, larsi@gnus.org, 18522@debbugs.gnu.org > Date: Mon, 22 Feb 2016 21:41:11 +0100 > > On Mon, Feb 22 2016, Eli Zaretskii wrote: > > > I think the next step is to profile the code below "let". Can you try > > using 'perf' for that purpose? > > Slow emacs: almost all time is spent in Fset_default (96%) > > Fast emacs: > 25.36% emacs emacs [.] eval_sub > 10.73% emacs emacs [.] Fset_default > 9.63% emacs emacs [.] Flength > 6.54% emacs emacs [.] unbind_to > 5.44% emacs emacs [.] hash_lookup > 4.53% emacs emacs [.] Flet So now the question becomes: which part of Fset_default? I thought it was the loop over all the buffers, but your session seems to say it couldn't be. Then what is it? > You can try it too on your running sessions: "perf record -p PID" and > then "perf report". (just use something like "dotimes (i 1000000000)") Alas, there's no 'perf' on MS-Windows (nor anything like it, AFAIK).