WP Smush Pro too slow for 200,000 images

Hi WPMUDEV Team,
I have almost 210,000 images on my two websites combined and i was trying to to smush them. But your software's speed is very slow. It looks like it will take a month to smush all those images. And for it to run, i have to keep the admin window open.

1: Is there a way i can increase this smushing speed?
2: Is there a way to automate it so that i don't need to keep the admin window all the time and it runs in the background automatically?

Thanks,
Shiraz