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- Newsgroups: comp.sys.mac.hardware
- Path: sparky!uunet!caen!zaphod.mps.ohio-state.edu!rpi!simsh
- From: simsh@vccnw06.its.rpi.edu (Chewbacca)
- Subject: Re: SPEED and SPEED your IIsi
- Message-ID: <+cp1=nd@rpi.edu>
- Nntp-Posting-Host: vccnw06.its.rpi.edu
- References: <1992Nov8.114114.24899@news.Hawaii.Edu> <pmontan-101192150035@paulmac.nswc.navy.mil>
- Date: Tue, 10 Nov 1992 22:48:42 GMT
- Lines: 32
-
- pmontan@nswc-wo.navy.mil (Paul Montanaro) writes:
-
- >In article <1992Nov8.114114.24899@news.Hawaii.Edu>,
- >guiyu@spectra.eng.hawaii.edu (Kui Yu Chang) wrote:
- >>
- >> For those who still don't know, I just read something here that says by
- >> setting the Disk Cache in Sys7 to 768K, you get faster screen updates on
- >> your Macintosh IIsi because all the RAM in Bank A(where the video memory
- >> is also allocated)will be used-up.
- >>
- >> I did an EXPERIMENT immediately and find that the speed-up is IMPRESSIVE!!!
- >>
- >>REST DELETED
-
- >Try redoing your test with lots of inits loaded. I think you will find
- >that
- >in this case having such a high cache setting is not necessary. That's
- >because the inits also fill up the RAM in Bank A. On my IIsi with lots of
- >inits I found the optimum cache setting to be between 128K - 256K. Also
- >according to Speedometer 3.1, setting the cache too high to 768K causes the
-
- >disk speed to slow down dramatically.
-
- On my IIsi with 128K cache and a system size of 2300K (!!!) with all INITs
- loaded, Speedometer rates my CPU at 5.492. With many INITs removed, but cache
- size the same, I get rated at 3.736. Similarly everything else is sped up
- with all the INITs. So for those of you with very large system files, there's
- no need to increase the cache much as it won't help much, although there are
- some other benefits on all machines with a larger cache.
- --
- Hillel Sims e-mail: simsh@rpi.edu
- >:-) The Smiling Vulcan Rensselaer Polytechnic Institute
-