Ever wonder why software is so slow...?

Because it's all written by retards.

https://github.com/ArtifexSoftware/jbig2dec/blob/master/jbig2_image.c

Scroll down to jbig2_image_compose_unopt()... and then facepalm. It doesn't take a genius to realise that twiddling an image pixel-by-pixel is going to be dead slow.

>>28
Waiting 5 seconds every time you "turn the page" on an ebook means technology has failed. It would be faster to flip through the hardcopy. After the fix, it's at a far more reasonable ~0.5s/page.