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Re: TO COMPRESS OR NOT TO CMPRS (please reply)
C. Harald Koch writes:
> Does anyone (perhaps PPP people?) have statistics on whether compression at
> the packet layer is actually effective? What percentage of packets on a real
> network are compressible? What compression ratios do you get? What's the
> extra latency of the compression?
I don't have the percentage figure, but using STAC, you can generally
get 2:1 compression on average. Small GIFs in web pages don't seem to
matter, but the big ones do. With a properly designed system, you
actually get better latency with compression, due to the shortened
packets.
> What's the tradeoff between compressing the data stream (above TCP) v.s.
> individual packets?
Compressing at the TCP level is better, but if it doesn't exist, then
it is worse. :-)
--
Karl Fox, servant of God, employee of Ascend Communications
3518 Riverside Drive, Suite 101, Columbus, Ohio 43221 +1 614 326 6841
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