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From: CXT105@psuvm.psu.edu (Christopher Tate)
Newsgroups: comp.sys.mac.misc
Subject: Re: MS Word slow on MacIIsi
Message-ID: <90330.141021CXT105@psuvm.psu.edu>
Date: 26 Nov 90 19:10:21 GMT
References: <3294@ns-mx.uiowa.edu>
Organization: Penn State University
Lines: 24

Just a thought, but something that might be relevant was discussed recently
over in comp.sys.mac.programmer....

The new "32-bit-clean" ROM's have a serious problem with the Memory
Manager, which causes memory allocation to potentially take a very long
time indeed (one programmer reported the allocation of a single, non-
relocatable block taking 5 seconds on a IIfx!).  Since MS Word does a lot
of jiggery-pokery swapping pieces of the document into and out of memory,
it may well be that the memory allocation needed for this process is taking
a phenomenally long time, and killing your performance.

The machines which have this "32-bit-clean" ROM are the IIfx, the IIci, and
the IIsi (as far as I know).  Apple is currently working on a fix for the
problem, which will essentially require a complete rewrite of the Memory
Manager code.

Disclaimer:  I'm just summarizing info that I picked up by reading comp.sys.
mac.programmer; if I get anything wrong, it's because I'm not with Apple. :)

-------
Christopher Tate          |  Alterwise by owl-light in the half-way house
                          |  The gentleman lay graveward with his furies.
cxt105@psuvm.psu.edu      |
cxt105@psuvm.bitnet       |                          -- Dylan Thomas