From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#64735: 29.0.92; find invocations are ~15x slower because of ignores Date: Tue, 25 Jul 2023 21:42:07 +0300 Message-ID: <83351bq1ds.fsf@gnu.org> References: <1fd5e3ed-e1c3-5d6e-897f-1d5d55e379fa@gutov.dev> <87wmyupvlw.fsf@localhost> <5c4d9bea-3eb9-b262-138a-4ea0cb203436@gutov.dev> <87tttypp2e.fsf@localhost> <87r0p030w0.fsf@yahoo.com> <83sf9f6wm0.fsf@gnu.org> <83sf9eub9d.fsf@gnu.org> <2d844a34-857d-3d59-b897-73372baac480@gutov.dev> <83bkg2tsu6.fsf@gnu.org> <83bd4246-ac41-90ec-1df3-02d0bd59ca44@gutov.dev> <834jlttv1p.fsf@gnu.org> <937c3b8e-7742-91b7-c2cf-4cadd0782f0c@gutov.dev> <83a5vlsanw.fsf@gnu.org> <69a98e2a-5816-d36b-9d04-8609291333cd@gutov.dev> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="14860"; mail-complaints-to="usenet@ciao.gmane.io" Cc: luangruo@yahoo.com, sbaugh@janestreet.com, yantar92@posteo.net, 64735@debbugs.gnu.org To: Dmitry Gutov Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Tue Jul 25 20:43:22 2023 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1qON0A-0003eD-JW for geb-bug-gnu-emacs@m.gmane-mx.org; 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Original-Received: from [87.69.77.57] (helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qOMyI-0004rK-Fn; Tue, 25 Jul 2023 14:41:22 -0400 In-Reply-To: <69a98e2a-5816-d36b-9d04-8609291333cd@gutov.dev> (message from Dmitry Gutov on Tue, 25 Jul 2023 05:41:13 +0300) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-mx.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:266089 Archived-At: > Date: Tue, 25 Jul 2023 05:41:13 +0300 > Cc: luangruo@yahoo.com, sbaugh@janestreet.com, yantar92@posteo.net, > 64735@debbugs.gnu.org > From: Dmitry Gutov > > >> One thing to try it changing the -with-find implementation to use a > >> synchronous call, to compare (e.g. using 'process-file'). And repeat > >> these tests on GNU/Linux too. > > > > This still uses pipes, albeit without the pselect stuff. > > I'm attaching an extended benchmark, one that includes a "synchronous" > implementation as well. Please give it a spin as well. > > Here (GNU/Linux) the reported numbers look like this: > > > (my-bench 1 default-directory "") > > (("built-in" . "Elapsed time: 1.601649s (0.709108s in 22 GCs)") > ("with-find" . "Elapsed time: 1.792383s (1.135869s in 38 GCs)") > ("with-find-p" . "Elapsed time: 1.248543s (0.682827s in 20 GCs)") > ("with-find-sync" . "Elapsed time: 0.922291s (0.343497s in 10 GCs)")) Almost no change on Windows: (("built-in" . "Elapsed time: 1.218750s (0.078125s in 5 GCs)") ("with-find" . "Elapsed time: 8.984375s (0.109375s in 7 GCs)") ("with-find-p" . "Elapsed time: 8.718750s (0.046875s in 3 GCs)") ("with-find-sync" . "Elapsed time: 8.921875s (0.046875s in 3 GCs)")) I'm beginning to suspect the implementation of pipes (and IPC in general). How else can such slowdown be explained?