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Re: Performance issue of libtool-2.4.4


From: Bob Friesenhahn
Subject: Re: Performance issue of libtool-2.4.4
Date: Thu, 5 Feb 2015 22:12:29 -0600 (CST)
User-agent: Alpine 2.01 (GSO 1266 2009-07-14)

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:

2.4.2 : 23.613
2.4.3 : 31.697
2.4.4 : 28.236
2.4.5 : 28.514

And here are timings for a non-optimize (-O0) compile with no debug symbols:

2.4.2 :  8.629
2.4.3 : 13.216
2.4.4 : 13.012
2.4.5 : 13.281

I see similar slowdowns on an Illumos-based system, so it is not specific to GNU/Linux.

It is curious that there is more impact for the optimized builds.

Bob
--
Bob Friesenhahn
address@hidden, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/



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