From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Pixel-based display functions Date: Sat, 07 Feb 2015 15:08:04 +0200 Message-ID: <83h9uxc1jf.fsf@gnu.org> References: <54CDE908.7050908@gmx.at> <87ioflq0dz.fsf@building.gnus.org> <54CE2187.9070003@gmx.at> <83lhkhiq8t.fsf@gnu.org> <54CE54A3.1020707@gmx.at> <838ughilmo.fsf@gnu.org> <54CE6BD2.8000402@gmx.at> <8361bliin0.fsf@gnu.org> <83386piiby.fsf@gnu.org> <87oap9yoti.fsf@building.gnus.org> <874mqzvnwo.fsf@building.gnus.org> <83h9uzeb4a.fsf@gnu.org> <87bnl7jrr7.fsf@building.gnus.org> <831tm3dt8u.fsf@gnu.org> <87k2zvgj4d.fsf@building.gnus.org> <83siejcahb.fsf@gnu.org> <83sieiar6i.fsf@gnu.org> <83oap5c480.fsf@gnu.org> <87d25lc3xu.fsf@building.gnus.org> <877fvtc2qj.fsf@building.gnus.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1423314501 9363 80.91.229.3 (7 Feb 2015 13:08:21 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 7 Feb 2015 13:08:21 +0000 (UTC) Cc: rudalics@gmx.at, emacs-devel@gnu.org To: Lars Ingebrigtsen Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat Feb 07 14:08:21 2015 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1YK57V-0003yM-1P for ged-emacs-devel@m.gmane.org; Sat, 07 Feb 2015 14:08:21 +0100 Original-Received: from localhost ([::1]:53008 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YK57U-0000JG-6R for ged-emacs-devel@m.gmane.org; Sat, 07 Feb 2015 08:08:20 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:38985) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YK57O-0000Db-JV for emacs-devel@gnu.org; Sat, 07 Feb 2015 08:08:18 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YK57J-0002Nu-Kd for emacs-devel@gnu.org; Sat, 07 Feb 2015 08:08:14 -0500 Original-Received: from mtaout21.012.net.il ([80.179.55.169]:65342) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YK57J-0002Ne-Ce for emacs-devel@gnu.org; Sat, 07 Feb 2015 08:08:09 -0500 Original-Received: from conversion-daemon.a-mtaout21.012.net.il by a-mtaout21.012.net.il (HyperSendmail v2007.08) id <0NJE00600JAN1L00@a-mtaout21.012.net.il> for emacs-devel@gnu.org; Sat, 07 Feb 2015 15:08:07 +0200 (IST) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by a-mtaout21.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NJE006FEKHI0V50@a-mtaout21.012.net.il>; Sat, 07 Feb 2015 15:08:07 +0200 (IST) In-reply-to: <877fvtc2qj.fsf@building.gnus.org> X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: Solaris 10 X-Received-From: 80.179.55.169 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 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.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:182602 Archived-At: > From: Lars Ingebrigtsen > Cc: rudalics@gmx.at, emacs-devel@gnu.org > Date: Sat, 07 Feb 2015 23:42:12 +1100 > > I've got one question about `vertical-motion': Why is it apparently > slower than `window-text-pixel-size'? Because it solves a harder problem. It is easier to get to a given buffer position than it is to get to a given pixel X coordinate: in the latter case you need to start from a position that has a known X coordinate, so you need first to get there. But I suggest to time these 2 functions without their shr-* wrappers, as I'm not sure the difference is so large. Also, did you invoke vertical-motion from the beginning of a physical line, or from some place in the middle of the line?