[Bug tree-optimization/18687] [4.0/4.1/4.2 Regression] ~50% compile time regression

[steven at gcc dot gnu dot org]

------- Comment #32 from steven at gcc dot gnu dot org  2006-09-03 11:37 -------
Just to be sure that between 7/24 and today we didn't speed up significantly:

"real" times for hashes100.c (x86_64-linux, Intel Xeon 3.2 GHz, 1GB RAM):

        3.4.6      4.2-svn20060903    delta
-O0     0m1.618s   0m1.634s           +1%
-O1     0m2.743s   0m5.175s           +88%
-O2     0m4.686s   0m7.719s           +65%

"real" times for infcodes100.c:
        3.4        4.2-svn20060903    delta
-O0     0m3.040s   0m3.526s           +16%
-O1     0m4.989s   0m8.871s           +77%
-O2     0m8.375s   0m13.334s          +59%


Given these numbers, I would stick with gcc3 if I were a kernel developer.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18687