- old:
- if pixAlpha >= alpha_ignore:
- for colour_id in filtered_colours_to_filter:
- ..
- new:
- pixcache = dict() // before y loop
- if pixAlpha >= alpha_ignore:
- winnerID = pixcache.get(pix)
- if not winnerID:
- for colour_id in filtered_colours_to_filter:
- ..
- pixcache[pix] = winnerID;