[Bug target/38306] [4.4/4.5 Regression] 15% slowdown w.r.t. 4.3 of computational kernel on some architectures

bonzini at gnu dot org gcc-bugzilla@gcc.gnu.org
Tue Sep 1 08:54:00 GMT 2009



------- Comment #15 from bonzini at gnu dot org  2009-09-01 08:54 -------
Please try -O2 and -O2 -funroll-loops too, since -O3 is not always good for
speed.  (It would be even better if -O2 is not slower and you can find out what
the culprit is at -O3; this is not necessarily possible though).


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38306



More information about the Gcc-bugs mailing list