Date: Fri, 9 Feb 2001 14:15:17 -0800
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: "David L. Cassell" <Cassell.David@EPAMAIL.EPA.GOV>
Subject: Re: SAS Compress vs GZIP
Content-type: text/plain; charset=us-ascii
One point which Jack shoemaker did not stress sufficiently [IMHO] is
the size of the compressed data set. SAS Compress will squish records
with consecutive identical bytes, and will get something like a 10%
rate [it varies depending on your data, of course]. gzip will squish
everything in sight, usually getting significantly more size reduction.
Of course, using SAS compress costs you only about 10% or 15% of the time
to read the uncompressed data set. With gzip you have to use an x command
to shell out to the OS and uncompress the file, and then do the read.
If you have a serious space crunch and have the time, gzip may help. Of
course, buying a new hard drive will help more...
David Cassell, OAO Corp. Cassell.David@epa.gov
Senior computing specialist