On 2013-01-08 09:11, Jeroen Demeyer wrote: > On 2013-01-07 23:43, Volker Braun wrote: >> But the command is mostly linear algebra over QQ. Its possible that the >> old GCC does something very stupid, but I doubt that you can speed up >> integer computations by a factor of 5x just by optimizing code paths. So >> it pretty much must be the blas inside linbox. > > It's IML (Integer Matrix Library). Recompiling that with GCC-4.6.3 gave > the speed-up. But: no compiler *flags* have changed. So it really > looks like a matter of optimizing code paths...
Or perhaps the newer GCC use vector instructions by default, while the old GCC doesn't? -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To post to this group, send email to sage-devel@googlegroups.com. To unsubscribe from this group, send email to sage-devel+unsubscr...@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel?hl=en.
