I can't remember the very specifics, but one particular instance that sticks out is when I was creating some images on the fly for tobii eye-tracking software.

I can't remember the very specifics, but one particular instance that sticks out is when I was creating some images on the fly for tobii eye-tracking software. I was using pillow, I remember... I think it might have been pillow which wouldn't work well with PyPy. I'll try to dig out my code later and see what specifically made things not work with PyPy in a few days