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Re: 2.5X slowdown with g++ 3.4 (probably 3.3 also) over 3.2
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From: |
Maurizio Loreti |
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Subject: |
Re: 2.5X slowdown with g++ 3.4 (probably 3.3 also) over 3.2 |
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Date: |
22 Sep 2005 18:25:48 +0200 |
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User-agent: |
Gnus/5.09 (Gnus v5.9.0) Emacs/21.4 |
what comes to mind, is that a version of g++ generates code optimized
for a given target (say, i686) where the others no... or that the
standard libraries (libstdc++, glibc) were generated for different
cpus... or that a version of g++ uses different floating point
options that the others... did you ./configure and make yourself to
build gcc and/or libraries?
--
Maurizio Loreti http://www.pd.infn.it/~loreti/mlo.html
Dept. of Physics, Univ. of Padova, Italy ROT13: ybergv@cq.vasa.vg