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From: | Robert Yang |
Subject: | Re: Performance issue of libtool-2.4.4 |
Date: | Mon, 9 Feb 2015 10:45:58 +0800 |
User-agent: | Mozilla/5.0 (X11; Linux i686; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 |
On 02/06/2015 10:46 PM, Bob Friesenhahn wrote:
On Fri, 6 Feb 2015, Robert Yang wrote:On 02/06/2015 12:12 PM, Bob Friesenhahn wrote:I am not seeing quite the difference between libtool releases that you are although I see a big slowdown starting with 2.4.3. These timings are for optimized builds of GraphicsMagick on a 12-core GNU/Linux system using -j 12:I think that we can't see obviously slowdown by "make -jN", but "make -j1" will. And bash is much slower than dash, I'm trying to figure out why.It seems like this issue is already corrected in the source tree but you are
Yes, I think that the git repo has fixed the problem: commit 408cfb9c5fa8a666917167ffb806cb19deded429 Author: Gary V. Vaughan <address@hidden> Date: Fri Feb 6 12:58:34 2015 +0000 libtool: don't execute automake and autoconf on every invocation. // Robert
correct that the issue is much more apparent with -j1. Optimized: 2.4.2 : 3:43.43 2.4.5 : 4:33.11 Non-Optimized: 2.4.2 : 1:21.21 2.4.5 : 2:05.48 We need a test case which is executed before every major release to make sure that a performance regression has not been introduced. Bob
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