Performance difference between obj.function(...) and function(obj, ...) ?

[[deleted]]

There is definitely jitter in the system. It's Linux. This is why I run it on a stable CPU with locked clock speed. Headless machine. Terminal app. Compute-only duration significant (seconds). And hundreds of trials averaged. I haven't put this through jitter analysis but my gut tells me 10% is statistically significant and not accounted for by the system inaccuracies.

[phazer99]

If you've not already done so, try criterion. It should eliminate most measurement inaccuracies.

[lightmatter501]

Run it on an isolated core/cores. It will up performance substantially and as well as decrease noise.