New Zealand ADSL Mailing List


Re: JetStart versus Modem

From: Steve Lang <steve_at_spl.co.nz>
Date: Sun, 18 May 2003 22:31:19 +1200
Message-ID: <3EC760F7.5040207@spl.co.nz>

Hiya.

Also, if I remember correctly, there is a lag in new ip connections
before the rate limiting cuts in. For casual browsing this (and the
latency) may provide a better user experience vs. a physically limited
analogue modem connection.

Cheers -

Tom Parker wrote:

>The reduced latency of the ADSL link will have a big effect on the perceived
>speed of loading a webpage. You can't load more than a few images per second
>if your latency is ~150ms, and when the link is saturated, you have no hope.
>Jetstart behaves better than a modem when it is near saturation (although it
>still isn't that good if you really saturate it).
>
>Most modern webservers will gzip data before sending to a modern browser,
>so the entire internet benefits from the compression.
>
>Jetstart could use compression in the PPP protocol (which for a is superior
>to the modem's which introduces latency (the modem waits, hoping for a more
>suitable chunk of data, if there is no more, that waiting time is wasted). Of
>course they could also turn up the handle on the rate limiter which would have
>a similar effect.
>
>A compressed tunnel through the jetstart link to a server at your isp would
>have the same effect.
>
>

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Received on Sun May 18 22:31:58 2003

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