1080p image (rock.exr), preloaded into the ColMap img. Transform preloaded into the Transform tran. What's timed is the application with apply().

The amount of time to apply each given Transform to a 1920*1080 Image on my 4 code (8 thread) CPU:

apply(ol.LUT): 0.026462205679908948,, (avg. 100 Trials) *sRGB LUT
apply(ol.Func): 0.064781568400030659, (avg. 100 Trials) *Builtin (C++) Function sRGB
apply(ol.Func): 0.55080005893347939, (avg. 15 Trials) *Generic (Python) Function sRGB
apply(ol.ColMat): 0.019661276286992234, (avg. 1000 Trials)

#OLD
apply(ol.ColMat): 0.98610644233346345, (avg. 15 Trials) *ACES --> sRGB
apply(ol.LUT): 0.15440896909999538, (avg. 100 Trials) *sRGB LUT