Dear Dominique, > I think it is the automatic array in the subroutine trisolve. Note that the > speedup is rather 27->19s and may be darwin specific (slow malloc).
I saw a speed-up of similar order on FC9/x86_64. I strongly doubt that it is anything to do with the automatic array - if it is there is an error somewhere, since none of the references to trisolve need copy-in/copy-out. > > Note also that -fstack-arrays prevents some optimizations on > fatigue: 4.7->7s. This may be related to pr45810. Has PR45810 converged now? If I have understood properly, a patch has been devised that cures the problem and does not cause slow-downs anywhere else? Cheers Paul
