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From: huebner@aerospace.aero.org (Robert E. Huebner)
Newsgroups: comp.sys.amiga
Subject: Re: Modems
Message-ID: <85485@aerospace.AERO.ORG>
Date: 13 Sep 90 17:57:37 GMT
References: <826.26EF2259@weyr.FIDONET.ORG> <90256.111652UH2@psuvm.psu.edu>
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Reply-To: huebner@sunpoison.UUCP (Robert E. Huebner)
Organization: The Aerospace Corporation, El Segundo, CA
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In article <90256.111652UH2@psuvm.psu.edu> UH2@psuvm.psu.edu (Lee Sailer) writes:
>
>It occurs to me.  Does this mean that little will be gained for the
>transmission of ZOO and LZ files, since they are already compressed?
>(assuming error free lines, of course)

Yes.  The throughput of a compressed data stream is hardly constant.  Many
download protocols give you an indication of the current BPS for this
very reason.  Using something like an HST-DS (Dual Standard) V.32 you get
more compression transmitting a text file than something that's been
.lzh'ed.  There is a significant speed increase on both, however. I wouldn't
say "little is gained."  I think the speed achievable is still on the
order of 2:1 for even the most densely packed files using HST-DS.

Robert Huebner		huebner@aerospace.aero.org