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[Bug regression/16703] [3.5 Regression] g++ v3.5.0 produces slower code than v3.4.1 for loops.
- From: "falk at debian dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 25 Jul 2004 12:35:10 -0000
- Subject: [Bug regression/16703] [3.5 Regression] g++ v3.5.0 produces slower code than v3.4.1 for loops.
- References: <20040725044032.16703.godaves@yahoo.com>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From falk at debian dot org 2004-07-25 12:35 -------
Well, those benchmarks are highly artificial, and therefore of doubtful
value. They certainly also don't all measure the same thing. Moreover, if
you're interested in loop performance, you should really try the lno branch,
since that is the only place where loop work is going on. It already brings
some progress, for example "nestedloop" is about 746 times faster :-)
I suggest you retry with lno-branch, and then single out benchmarks which
shows really noticeable (say, >50%) regression.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16703