Hello, i have seen something pretty weird.
I used some clips from my canon 70D for testing the denier II in this way:
A- Color gradient, Levels, and shadows and highlight (ON ADJUST LAYER). This use de 100% of the CPU
B- Color gradient, Levels, and shadows and highlight (ON ADJUST LAYER) Denoiser II (ON THE CLIP). This use -25% of the CPU
C- Color gradient, Levels, and shadows and highlight, Denoiser II (ON ADJUST LAYER) This used -25% of the CPU
The problem is the Plugin it self, may be some of you can find why?