ALLEZARD Nicolas 204231 wrote: > I tried the v2.1 profiler like this luajit -jp spectralnorm.lua (code > attached) but i got only this > 1.274219991 > [No samples collected] Well, how long did it run? If the run was too short, no samples could be collected. Make sure to run any benchmark at least a couple seconds. If this is the standard spectralnorm benchmark, you need to pass a scale factor as an argument. Try a number around 3000. --Mike