From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 9512 invoked by alias); 6 Feb 2008 15:25:53 -0000 Received: (qmail 9502 invoked by uid 22791); 6 Feb 2008 15:25:52 -0000 X-Spam-Check-By: sourceware.org Received: from main.gmane.org (HELO ciao.gmane.org) (80.91.229.2) by sourceware.org (qpsmtpd/0.31) with ESMTP; Wed, 06 Feb 2008 15:25:28 +0000 Received: from list by ciao.gmane.org with local (Exim 4.43) id 1JMm9K-0001x1-A8 for ecos-discuss@sources.redhat.com; Wed, 06 Feb 2008 15:25:23 +0000 Received: from c-76-17-159-23.hsd1.mn.comcast.net ([76.17.159.23]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 06 Feb 2008 15:25:22 +0000 Received: from grante by c-76-17-159-23.hsd1.mn.comcast.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 06 Feb 2008 15:25:22 +0000 To: ecos-discuss@sources.redhat.com From: Grant Edwards Date: Wed, 06 Feb 2008 15:25:00 -0000 Message-ID: References: User-Agent: slrn/0.9.8.1 (Linux) X-IsSubscribed: yes Mailing-List: contact ecos-discuss-help@ecos.sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: ecos-discuss-owner@ecos.sourceware.org Subject: [ECOS] Re: Uart missing chars when in Release X-SW-Source: 2008-02/txt/msg00032.txt.bz2 On 2008-02-06, Laurie Gellatly wrote: > A small update on this subject. I found I did not have any > optimisation on in the release version. When I added -Os or > -O3 most of the problems disappeared. I'm planning to try to > isolate which section of code makes the difference and then > look at optimising how it works. You might want to do some size/performance measurements with different optimization switches. On some of the platforms I use, -O3 code is a lot bigger than -O2 and not measurably faster. I've also seen projects where -O2 is both smaller and faster than -Os. -- Grant Edwards grante Yow! DIDI ... is that a at MARTIAN name, or, are we visi.com in ISRAEL? -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss