Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!samsung!uunet!infonode!drudetb
From: drudetb@infonode.ingr.com (Ted B. Drude)
Newsgroups: comp.sys.ibm.pc
Subject: Re: EMM386.EXE slows down Hyperdisk
Message-ID: <1991Jun26.142545.8917@infonode.ingr.com>
Date: 26 Jun 91 14:25:45 GMT
References: <25639@well.sf.ca.us> <4481@bruce.cs.monash.OZ.AU>
Distribution: comp
Organization: Intergraph Corp. Huntsville, AL
Lines: 18

In article <4481@bruce.cs.monash.OZ.AU> maurice@sol6.cs.monash.edu.au (Maurice David Castro) writes:
>From article <25639@well.sf.ca.us>, by al@well.sf.ca.us (Alfred Fontes):
[...]
]>> Unfortunately, EMM386.EXE  seems to slow Hyperdisk down, on the
>> order of 50%. Has anybody else had this problem?  What can I do about it?
[...]
>> Apart from being the standard for LIM there seems to be no advantage
>> in using EMM386. 
>Maurice Castro
[...]
My own testing of EMM386.SYS vs. Quarterdeck's QEMM386.SYS shows that
the Microsoft driver is considerably slower under DOS 3.x and 4.x. The generic
OEM 386 LIM drivers provided with most new systems are similarly faster. I
haven't studied the source code,  but it seems that Microsoft almost
deliberately slowed down their EMM386 driver,  or they simply didn't
know how to program the '386's memory paging architecture very well.

-Ted Drude (drudetb@ingr)