[16:05] <malv> so I am trying to benchmark my matrix multiply function. When I turn on -O3 the time it takes for a billion 3x3 matrix multiplies is 0
[16:05] <malv> why is this?
[16:06] <maddernick> compiler optimized something away?
[16:07] <malv> but what might do that
[16:08] <maddernick> look at the ASM output
[16:11] <malv> figured it out
[16:11] <malv> only seems to compute the matrix if I print it out at the end
[16:13] <maddernick> its clever like that ;)
[19:39] <Unit193> https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/988485  Anyone hit this_  Seems to be a bit slower, but could be the other things running.