On 2012-07-06 10:50, Jan Groenewald wrote: > Hi > > On 5 July 2012 12:40, Jan Groenewald <j...@aims.ac.za > <mailto:j...@aims.ac.za>> wrote: > > As an interesting aside, > > This problem, when running succesfully, on Ubuntu 11.04, took this long > > from upstream sage binary: 264 seconds > from sage source compiled: 11 seconds > > > I'd like to demonstrate to students why this difference exists. > Can someone suggest a short easily readable program that shows > why certain CPU flags/capabilities can cause such a speedup > between generically compiled binaries for minimum 64bit specs, > and a CPU specific from source build. You're sure you're comparing 64-bit vs. 64-bit?
I would look first at MPIR, say multiply two large numbers. -- -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
