If you skip PNG recompression isn't it a near-instant export?
It's a bit faster but still takes about 10-15 seconds and still exports all of the images - no compression = bigger in size.
Been observing folders I'm exporting to and most of this time goes to sprite sheeting animation frames.
I'm using raw and not yet optimized images, so they are 512x256 with a lot of opacity around. But i believe this will be a final image size, only content will differ.
8 of this images [attachment=1:3ct90yhd][/attachment:3ct90yhd]
are made into something like this [attachment=0:3ct90yhd][/attachment:3ct90yhd]
Yes, that's what I ask for.
"Skip png compression" still export images.