How to keep track uncompressed originals Images and compressed ones

I had build a chokidar program to watch for images in a folder and compress them and put in another folder. But it misses a few images per thousand images. If I restart the program it iterates from first. And this Idea seems a compute waste if my library of images increase. Is there any way in which I can keep track of compressed images and process only uncompressed ones?

Submitted July 26, 2020 at 05:10AM by ArunJRK