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Article #26372

Re: Dhrystone 2 (Actually, LSC weirdness)

#26372
From: Richard Siegel
Date: Tue, 15 Mar 1988 14:39
37 lines
2073 bytes

        In response to an original request from Mr. Chow, I ran the Dhrystone
2.0 under LightspeedC. I have a one megabyte Mac Plus, so I wasn't using
MultiFinder. I found that there was absolutely *no* difference in speed between
the version run as a project and the version run as a linked application.
(There was, of course, a speed gain derived from using the register variables.)

        It's just speculation, but consider the following: When you compile and
launch an unlinked project into a MultiFinder partition,  the project file
doesn't go through the normal launch process. (Actually, it never does, because
it's not an application.) It's very possible that because of the way the
project file is launched, the Finder isn't able to steal as many cycles from
other applications; this would certainly account for increased performance.

        Unfortunately, I don't know how the project file is launched, and I
don't know how LightspeedC interacts with MultiFinder. And I'm sure you folks
don't want me to distract Mr. Kahl from his work. :-)

Side issue:

        Has anyone noticed what an incredible hog the Finder is when it's
running under MultiFinder? Is there a good excuse for this besides pure
sloppiness and meanness of spirit? :-)

                --Rich

===================================================================
Rich Siegel
Confused Undergrad, Carnegie-Mellon University

The opinions stated here do not represent the policies
of Carnegie-Mellon University.

Arpa: rich.siegel@andrew.cmu.edu
UUCP: {decvax,ucbvax,sun}!andrew.cmu.edu!rich.siegel
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Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!husc6!bbn!rochester!PT.CS.CMU.EDU!andrew.cmu.edu!rs4u+
From: rs4u+@andrew.cmu.edu (Richard Siegel)
Newsgroups: comp.sys.mac
Subject: Re: Dhrystone 2 (Actually, LSC weirdness)
Message-ID: <UWDI8Dy00WAIs1Q0JO@andrew.cmu.edu>
Date: 15 Mar 88 14:39:11 GMT
Organization: Carnegie Mellon University
Lines: 36
In-Reply-To: <4004@batcomputer.tn.cornell.edu>