> After a further six months of nagging doubts about the proprietary “window mask” technology I had designed, I decided to take the plunge and do what Jörn had

> After a further six months of nagging doubts about the proprietary “window mask” technology I had designed, I decided to take the plunge and do what Jörn had suggested might lead to a considerable increase in rendering speed: namely, to abandon the window masks (which, it turned out, might as well have been called “regions”), and use a traditional dirty-rectangle window management system, as used in SymbOS. This is pretty funny when you recall regions were a key part of the original Macintosh system software — as described in “I Still Remember Regions”: http://www.folklore.org/StoryView.py?story=I_Still_Remember_Regions.txt http://www.folklore.org/StoryView.py?story=I_Still_Remember_... See also “Busy Being Born”, currently on the front page: http://www.folklore.org/StoryView.py?story=Busy_Being_Born.txt http://www.folklore.org/StoryView.py?story=Busy_Being_Born.t... https://news.ycombinator.com/item?id=10188952 https://news.ycombinator.com/item?id=10188952