Running #Retrobatch on an M3 Max chip is just magic. Resizing 10.000 images with this app takes about ~3 mins. This app seems nicely optimised to use Apple's image frameworks and those seem nicely tuned for the M3 Max.
I remember a time not *that* long ago I was easily waiting >30mins for results in similar workflows.
If you're doing anything related to batch image processing, you really should check out https://flyingmeat.com/retrobatch/