Cool! Regardless of whether your code gets merged, it shows that xdisp.c can be tamed. Like Roger Bannister who ran the miracle mile, you showed that it can be

Cool! Regardless of whether your code gets merged, it shows that xdisp.c can be tamed. Like Roger Bannister who ran the miracle mile, you showed that it can be done. Hopefully more will chip in and slay the Emacs redisplay code beast.