I have 12,000 images, we started the smush process last

I have 12,000 images, we started the smush process last night, so far about 1/6 the way through however it is showing 0.00b - I wonder if stuff is actually being smushed and processed? Or will this show only at the very end.

I dont want to run this for 2-3 days to find it id didnt take.. screen shot attached