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Article #66

Re: To compress or not to compress?

#66
From: Jerry Aguirre
Date: Tue, 26 Jan 1993 00:12
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In article <1k18fcINN274@ftp.UU.NET> tom_limoncelli@Warren.MENTORG.COM (Tom Limoncelli) writes:
>I expected it to be better to off-load the dirty work to the modem,
>since my Sun3 is so slow.  However, I found that the 2x bytes going
>through the serial port slowed things down worse than running
>"compress" on the Sun3.

I have measured the CPU used and running compress actually saves cycles
because later uuxqt and uucico have half the data to process.  The time
saved copying, checksumming and servicing interups is slightly more than
that used by the compress program.

That was for sending.  On receive the savings should be even greater
as receiving typically results in more interupts and uncompress uses
less cycles than compress.
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Path: arc1-ca.pugleaf.net!sparky!uunet!not-for-mail
From: jerry@olivea.ATC.Olivetti.Com (Jerry Aguirre)
Newsgroups: news.admin.technical
Subject: Re: To compress or not to compress?
Date: 25 Jan 1993 19:12:41 -0500
Organization: Olivetti ATC; Cupertino CA, USA
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