Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!olivea!mintaka!wookumz.gnu.ai.mit.edu!rjc From: rjc@wookumz.gnu.ai.mit.edu (Ray Cromwell) Newsgroups: comp.sys.amiga.advocacy Subject: Re: Amiga basher Message-ID: <1991Jun18.180758.23141@mintaka.lcs.mit.edu> Date: 18 Jun 91 18:07:58 GMT References: <1991Jun17.160936.14622@cs.mcgill.ca> <1991Jun18.111805.13387@marlin.jcu.edu.au> Sender: news@mintaka.lcs.mit.edu Organization: The Internet Lines: 48 In article <1991Jun18.111805.13387@marlin.jcu.edu.au> cpca@marlin.jcu.edu.au (Colin Adams) writes: >Yes, as soon as you have 2 processes using the CPU performance >really goes down, esp. on a 7.14 Mhz 68000. It's fine though if >you're in the middle of compiling 15 or so files and you can use the >editor at the same time without much slow down at all. The 3000 can >usually run 2 cpu intensive processes at once ok, although in my >limited experience on one (too expensive here!), the mouse pointer >did appear to jump about like a Mac with 1 process, or X-Windows... :-) Really? In my experience, the only things that cause the mouse pointer to become jerky on an Amiga are programs that: 1) Use the GEL/AnimOB system heavily For an example of this, run 2 copies of the anim example on the RKM companion disk. I suspect this is caused because of 2) 2) make too many calls to mrgcop/loadview/rethinkdisplay 3) OwnBlitter() and Disable() for long periods of time. 4) Layer.library getting bogged down by an exponential explosion of ClipRects. (e.g. Open 20 GZZ windows) If I run a ray-tracer and a mandelbrot generator, my 7mhz 68000 does not experience a jerky mouse pointer, however the gadget rendering is a little clunky. However, the problem can be easily solved by running CPU intensive programs at a lower priority (as long as they aren't poorly programmed. e.g. Make excessive calls to ReThinkDisplay, open too many windows, or Disable()/Forbid() for too long) >>*************************************************************************** >> >> "L'Avocat du Diable" >> >>*************************************************************************** > > >-- >Colin Adams >Computer Science Department James Cook University >Internet : cpca@marlin.jcu.edu.au North Queensland >'And on the eighth day, God created Manchester' -- / INET:rjc@gnu.ai.mit.edu * // The opinions expressed here do not \ | INET:r_cromwe@upr2.clu.net | \X/ in any way reflect the views of my self.| \ UUCP:uunet!tnc!m0023 * /