From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Arthur Miller Newsgroups: gmane.emacs.devel Subject: Re: Experiment with threads - no concurrency? Date: Mon, 06 Sep 2021 18:40:46 +0200 Message-ID: References: <83wnntr9i5.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="12451"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Mon Sep 06 18:42:00 2021 Return-path: Envelope-to: ged-emacs-devel@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 1mNHh1-00032p-MZ for ged-emacs-devel@m.gmane-mx.org; Mon, 06 Sep 2021 18:42:00 +0200 Original-Received: from localhost ([::1]:51620 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mNHh0-0006au-Mr for ged-emacs-devel@m.gmane-mx.org; Mon, 06 Sep 2021 12:41:58 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:44176) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mNHfy-0005ks-MR for emacs-devel@gnu.org; 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envelope-from=arthur.miller@live.com; helo=EUR02-HE1-obe.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:274149 Archived-At: Eli Zaretskii writes: >> From: Arthur Miller >> Date: Mon, 06 Sep 2021 16:35:04 +0200 >> >> I did a little experiment today. I wanted to count frequency of Emacs functions >> usage. So I started by indexing all functions and macros. >> >> Since it is kind of lot's of I/O and independent tasks to do, I thought threads >> could come handy. However I see no difference from sequential code. > > You shouldn't. Emacs doesn't switch threads on just any I/O, it > switches threads when it waits for input from subprocesses, network, > and keyboard. Allright, so in order to exploit I/O concurrency here, the only way is to start another emacs process asynchronously? Could split file list I get from directory-files-recursively into say 4 parts, and process files in 4 processes. Is there any benefit to use threads in that case? Not that it is terribly important, it takes like 3 seconds to parse all files in lisp dir sequentially, but now when I opened the question ...