From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.help Subject: Re: Optimising Elisp code Date: Sat, 06 Oct 2018 10:40:18 -0400 Message-ID: References: <638fb7dc-6fc5-4645-8793-97a00038a3a8@googlegroups.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1538836737 17444 195.159.176.226 (6 Oct 2018 14:38:57 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 6 Oct 2018 14:38:57 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sat Oct 06 16:38:53 2018 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1g8njJ-0004Se-3U for geh-help-gnu-emacs@m.gmane.org; Sat, 06 Oct 2018 16:38:53 +0200 Original-Received: from localhost ([::1]:39432 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1g8nlP-0004DO-MD for geh-help-gnu-emacs@m.gmane.org; Sat, 06 Oct 2018 10:41:03 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:46809) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1g8nkx-0004B9-2U for help-gnu-emacs@gnu.org; Sat, 06 Oct 2018 10:40:35 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1g8nks-0008Er-2a for help-gnu-emacs@gnu.org; Sat, 06 Oct 2018 10:40:34 -0400 Original-Received: from [195.159.176.226] (port=48423 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1g8nkr-0008A5-On for help-gnu-emacs@gnu.org; Sat, 06 Oct 2018 10:40:29 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1g8nif-0003pg-Cf for help-gnu-emacs@gnu.org; Sat, 06 Oct 2018 16:38:13 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 18 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:MytxcKkGti/gDeOdi4l2YB7KOn0= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 195.159.176.226 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.21 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.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.org gmane.emacs.help:118160 Archived-At: > What you're describing is called inline expansion. > AFAIK, the Elisp compiler doesn't do this automatically. Indeed, it doesn't do it automatically because it doesn't know how to (automatically) undo it, and it has visible effects w.r.t advice, debug-on-entry, etc... > You can define bar as a macro -- those HAVE to be expanded at compile > time, since that's how they work. > > You can also define an inline function using defsubst. From the Elisp > manual: And also with cl-defsubst, with (declare (compiler-macro ...)) and more recently with define-inline. Stefan