Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!ames!ll-xn!mit-eddie!uw-beaver!cornell!rochester!PT.CS.CMU.EDU!ROVER.RI.CMU.EDU!mkb
From: mkb@ROVER.RI.CMU.EDU (Mike Blackwell)
Newsgroups: comp.sys.mac
Subject: Re: QuickerDraw
Message-ID: <801@PT.CS.CMU.EDU>
Date: 4 Feb 88 14:14:15 GMT
Sender: netnews@PT.CS.CMU.EDU
Reply-To: mkb@rover.ri.cmu.edu (Mike Blackwell)
Organization: Carnegie-Mellon University, CS/RI
Lines: 7

The way I understand it, Hertzfeld made the remarkable discovery that when
you're in 8-bit mode, you never have to check if you need to do bit shifts,
since you're always byte aligned. Saves a couple of instructions per pixel,
which could be substantial. Why the color QuickDraw implementers didn't
figure this out, though, is beyond me - operating in 8-bit mode is common,
and should have been special cased in the first place.

		Mike Blackwell  ...  mkb@rover.ri.cmu.edu