I am running a command (pngquant to be precise: https://github.com/pornel/pngquant) in a terminal window. I noticed, that if I open 4 terminal windows, and run pngquant command in each of them, I get 4x speed increase, effectively compression 4 times as many images in the same time as before.
So I used this approach and assigned each pngqunat process a portion of images I want to compress, effectively creating multiple processes on multiple threads
Can you run command on multiple threads without doing this tricks that I did? I would like to just say "run pngquant compression on all this images and use all threads available."