If this is your cup of tea, have a look at Agner Fog's resources: http://agner.org/optimize/ http://agner.org/optimize/ Also, I'd have a look at Intel's VTune

If this is your cup of tea, have a look at Agner Fog's resources: http://agner.org/optimize/ http://agner.org/optimize/ Also, I'd have a look at Intel's VTune or the 'perf' tool that ships with the linux kernel.