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[Bug target/34163] [4.3/4.4/4.5 Regression] 10% performance regression since Nov 1 on Polyhedron's "NF" on AMD64
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 3 Jul 2009 11:14:36 -0000
- Subject: [Bug target/34163] [4.3/4.4/4.5 Regression] 10% performance regression since Nov 1 on Polyhedron's "NF" on AMD64
- References: <bug-34163-13404@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #20 from rguenth at gcc dot gnu dot org 2009-07-03 11:14 -------
Before:
Time for setup 0.139
Time per iteration 0.271
Total Time 6.649
Time for setup 0.136
Time per iteration 0.265
Total Time 10.210
Time for setup 0.134
Time per iteration 0.265
Total Time 7.276
Time for setup 0.134
Time per iteration 0.260
Total Time 11.572
After:
Time for setup 0.114
Time per iteration 0.238
Total Time 5.834
Time for setup 0.111
Time per iteration 0.233
Total Time 8.948
Time for setup 0.110
Time per iteration 0.237
Total Time 6.504
Time for setup 0.112
Time per iteration 0.235
Total Time 10.454
which seems to exactly recover this regression.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34163