From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 18354 invoked by alias); 28 Jun 2004 07:50:32 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 18343 invoked by uid 48); 28 Jun 2004 07:50:32 -0000 Date: Mon, 28 Jun 2004 07:56:00 -0000 Message-ID: <20040628075032.18339.qmail@sourceware.org> From: "pinskia at gcc dot gnu dot org" To: gcc-bugs@gcc.gnu.org In-Reply-To: <20040527100445.15678.gertom@inf.u-szeged.hu> References: <20040527100445.15678.gertom@inf.u-szeged.hu> Reply-To: gcc-bugzilla@gcc.gnu.org Subject: [Bug tree-optimization/15678] [3.5 Regression] Compilation time increased by 10-20% X-Bugzilla-Reason: CC X-SW-Source: 2004-06/txt/msg03557.txt.bz2 List-Id: ------- Additional Comments From pinskia at gcc dot gnu dot org 2004-06-28 07:50 ------- Interesting data point for the testcase with many empty functions -funit-at-a-time is faster for -O0 for 3.4.0 and 3.5.0 (note the timings for 3.5.0 in this case are not very good as this is with checking enabled): tin:~/src/gnu/gcctest>time ~/ia32_linux_gcc3_4/bin/gcc -S pr15678.c 6.870u 1.470s 0:08.86 94.1% 0+0k 0+0io 626pf+0w tin:~/src/gnu/gcctest>time ~/ia32_linux_gcc3_4/bin/gcc -S pr15678.c -funit-at-a-time 4.950u 0.940s 0:06.42 91.7% 0+0k 0+0io 624pf+0w tin:~/src/gnu/gcctest>time gcc -S pr15678.c 20.120u 0.770s 0:21.28 98.1% 0+0k 0+0io 741pf+0w tin:~/src/gnu/gcctest>time gcc -S pr15678.c -funit-at-a-time 16.520u 0.650s 0:17.68 97.1% 0+0k 0+0io 742pf+0w -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15678