From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: point-at-final-line Date: Sat, 27 Jan 2018 04:02:33 +0100 Organization: Aioe.org NNTP Server Message-ID: <86r2qcf1h2.fsf@zoho.com> References: <868tckgl1y.fsf@zoho.com> <87vafom6af.fsf@bsb.me.uk> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1517022226 15861 195.159.176.226 (27 Jan 2018 03:03:46 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 27 Jan 2018 03:03:46 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4 (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 Jan 27 04:03:42 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 1efGm7-000327-OW for geh-help-gnu-emacs@m.gmane.org; Sat, 27 Jan 2018 04:03:27 +0100 Original-Received: from localhost ([::1]:46965 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1efGo8-0001lM-A0 for geh-help-gnu-emacs@m.gmane.org; Fri, 26 Jan 2018 22:05:32 -0500 X-Received: by 10.223.164.143 with SMTP id g15mr1906461wrb.22.1517022164753; Fri, 26 Jan 2018 19:02:44 -0800 (PST) Original-Path: usenet.stanford.edu!j65no3788wmj.0!news-out.google.com!74ni0wme.0!nntp.google.com!proxad.net!feeder1-2.proxad.net!news.mixmin.net!aioe.org!.POSTED!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 34 Original-NNTP-Posting-Host: zRXoCvQ6k9fneBfYPnB6lQ.user.gioia.aioe.org Original-X-Complaints-To: abuse@aioe.org X-Notice: Filtered by postfilter v. 0.8.2 Cancel-Lock: sha1:O7C2z2TXxym/IiODK0kKKqfXfdM= Mail-Copies-To: never Original-Xref: usenet.stanford.edu gnu.emacs.help:221745 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:115862 Archived-At: Seems to be virtually no difference in performance. So I'll go with the best-looking code, which is "point-at-final-line". Unless there are new facts to the case brought to the courts attention... (defmacro measure-time (&rest body) "Measure and return the running time of the code block. Not mine: http://nullprogram.com/blog/2009/05/28/" (declare (indent defun)) (let ((start (make-symbol "start"))) `(let ((,start (float-time))) ,@body (- (float-time) ,start)))) (defun point-at-final-line () (= (line-number-at-pos) (line-number-at-pos (point-max)) )) ;; (insert (format "\n;; %f" (measure-time #'point-at-final-line))) ;; 0.000005 (defun point-at-final-line-2 () (save-excursion (end-of-line) (= 1 (forward-line 1)) )) ;; (insert (format "\n;; %f" (measure-time #'point-at-final-line-2))) ;; 0.000006 -- underground experts united http://user.it.uu.se/~embe8573