And please do it properly now like the others did and put the compressors into serial on a single track to exclude Multithreading...
It´s about what a single instance uses of a single core not what the whole system can take...
So take a single track with i.e. some audio on it... make the compressor work and duplicate it as often ON THE SAME TRACK until your CPU gives up...
Now do the same with your favourite non-special CPU hog compressor... and watch how you can load about 10 times as many instances as you can with the new compressor +... the "+" must stand for extra CPU hog...