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[Bug target/19923] [4.0/4.1/4.2/4.3 Regression] openssl is slower when compiled with gcc 4.0 than 3.3
- From: "dank at kegel dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 28 Nov 2007 18:01:24 -0000
- Subject: [Bug target/19923] [4.0/4.1/4.2/4.3 Regression] openssl is slower when compiled with gcc 4.0 than 3.3
- References: <bug-19923-6145@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #43 from dank at kegel dot com 2007-11-28 18:01 -------
Of the results posted above, the only interesting one that is still slower
than gcc-2.95 is a pentium 3 with -fPIC.
(Happily, gcc-4.3 is an improvement there, but it's still worse than 2.95.)
Oddly, this one does better with athlon-xp tuning.
/proc/cpuinfo info pic? tune
[t_34/t_295, t_401/t_295, t_43/t_295]
cpu family 6,model 11, Intel(R) Pentium(R) III CPU - S 1266MHz, -fPIC
tune=pentium3 [1.37, 1.72, 1.20]
cpu family 6,model 11, Intel(R) Pentium(R) III CPU - S 1266MHz, -fPIC
tune=athlon-xp [2.16, 2.49, 1.10]
I'm not sure how important Pentium III performance is anymore.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19923