This is the mail archive of the
mailing list for the GCC project.
Measuring FSF gcc from 4.1.2 to today on various benchmarks.
- From: Bradley Lucier <lucier at math dot purdue dot edu>
- To: gcc at gcc dot gnu dot org
- Cc: Bradley Lucier <lucier at math dot purdue dot edu>
- Date: Fri, 29 May 2009 15:58:00 -0400
- Subject: Measuring FSF gcc from 4.1.2 to today on various benchmarks.
I've put at
some compile-time and run-time statistics related to PR 39157 and PR
33928 and compile times and run times for the programs in the Gambit
Scheme benchmark suite. The statistics are for 4.1.2 release, 4.2.4
release, 4.3.3 release, 4.4.1 20090522, 4.5.0 20090521 (revision
147758), and 4.5.0 20090521 (revision 147758) with
-fno-forward-propagate; they use (mainly) the set of options
-O1 -fno-math-errno -fschedule-insns2 -fno-trapping-math -fno-strict-aliasing -fwrapv -fomit-frame-pointer -fPIC -fno-common -mieee-fp
on a Core 2 quad processor (running basically nothing else at the time).
I would conclude from the statistics that, right now, the cost of
including -fforward-propagate in -O1 overrides any performance benefit
that may result.