From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Heime via Users list for the GNU Emacs text editor Newsgroups: gmane.emacs.help Subject: Re: Advantage using mapc over dolist Date: Mon, 02 Dec 2024 20:17:36 +0000 Message-ID: References: <87ed2qpo3o.fsf@gnu.org> <871pyqfl62.fsf@web.de> <87r06por3q.fsf@neko.mail-host-address-is-not-set> Reply-To: Heime Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="24736"; mail-complaints-to="usenet@ciao.gmane.io" Cc: Michael Heerdegen , help-gnu-emacs@gnu.org To: Tomas Hlavaty Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Mon Dec 02 21:18:25 2024 Return-path: Envelope-to: geh-help-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 1tICsD-00067i-55 for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 02 Dec 2024 21:18:25 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tICrj-0005yX-S6; Mon, 02 Dec 2024 15:17:56 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tICrb-0005yE-HR for help-gnu-emacs@gnu.org; Mon, 02 Dec 2024 15:17:48 -0500 Original-Received: from mail-106102.protonmail.ch ([79.135.106.102]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tICrY-0007X2-O6 for help-gnu-emacs@gnu.org; Mon, 02 Dec 2024 15:17:47 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=protonmail.com; s=protonmail3; t=1733170661; x=1733429861; bh=71IjMRfRIeOrJFzbhLCX1ptT2I013Ly80UBdoVXbrUA=; h=Date:To:From:Cc:Subject:Message-ID:In-Reply-To:References: Feedback-ID:From:To:Cc:Date:Subject:Reply-To:Feedback-ID: Message-ID:BIMI-Selector:List-Unsubscribe:List-Unsubscribe-Post; b=aID1rSsXBVBbyX+VXN8qV/iN9zlFzH3SgOsOfuy7+7pU3B3jBCaOTb1aK9Lp+UNz2 AVBv4WBlHESJe2FsXiXTTD1QKua8TYfkeciepe5Wa46PMzng1VWDTLw3L9ykWfsNDI wwqnOhATUWU9i22jTcLWMoARyhTGKOGHMF4M/JOQ2qIBIAJsYzZzd2MZFEzLJ2RKlq sbMC3Y7GBAmNgDnaTqzVoKTHU5MyylZkZ7YTnfznLKj8p/VMcrdSeZfuSFMZf4OUsS M8liDSs68JyZcKxLVeasWzuI/HJwb5w2oB7FdQ/+TxJelLYFsHE8N9QgU8E+cEXe03 WYA9X71rd89tQ== In-Reply-To: <87r06por3q.fsf@neko.mail-host-address-is-not-set> Feedback-ID: 57735886:user:proton X-Pm-Message-ID: 516f36db66dd86c7d6014b67075d09378f30883f Received-SPF: pass client-ip=79.135.106.102; envelope-from=heimeborgia@protonmail.com; helo=mail-106102.protonmail.ch 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, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.help:148500 Archived-At: Sent with Proton Mail secure email. On Tuesday, December 3rd, 2024 at 6:51 AM, Tomas Hlavaty w= rote: > On Mon 02 Dec 2024 at 17:03, Heime via Users list for the GNU Emacs text = editor help-gnu-emacs@gnu.org wrote: >=20 > > Had thought the mapc would be faster. >=20 >=20 > mapc calls a function (length list) times, so unless the compiler is > clever enough to optimize this call away, it will be "slower" >=20 > however, if you want fast code, do not traverse lists whole and linearly > in the first place. instead, try to place the loop as far outside as > possible >=20 > > With dolist I can exit with (return) or catch-throw, can one do the > > same with mapc? >=20 >=20 > yes How can I find an example of exiting prematurely from mapc? =20 > > For what cases is mapc useful? >=20 >=20 > for side-effects, if you have the body of the loop as a function > already I see