> Can also look at some more challenging fonts with very fine curves, eg, Windows' KUNSTLER.TTF
I tested it, and the rasterizer output is almost identical.
Curiously, for this font, the dense rasterizer is faster even till 200-300 ppem font size
This is definitely because smooth is constrained by memory and has to restart (see longjmp) with narrower bands to handle the job. It looks like one restart for each glyph approximately.
Relevant files attached.
Do you mind continuing this discussion as an issue on GitLab?