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[Bug middle-end/45422] [4.6 Regression] compile time increases 3x.
- From: "Joost.VandeVondele at pci dot uzh.ch" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 25 Jan 2011 09:47:23 +0000
- Subject: [Bug middle-end/45422] [4.6 Regression] compile time increases 3x.
- Auto-submitted: auto-generated
- References: <bug-45422-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45422
--- Comment #33 from Joost VandeVondele <Joost.VandeVondele at pci dot uzh.ch> 2011-01-25 09:47:10 UTC ---
I just note that the timings reported by David and Jakub are not for the
compile options I originally reported.
With 4.6 (20110117) I now have
gfortran -c -ftime-report -cpp -fbounds-check -g -O3 -ffast-math -funroll-loops
-ftree-vectorize -march=native -ffree-form PR45422.F90
TOTAL : 102.15
while with the options used by David / Jakub I have timings similar to theirs.
gfortran -O3 -fbounds-check -ftime-report -c PR45422.F90
TOTAL : 42.87
With 4.5 timings remain ~44s