[6392] in www-talk@info.cern.ch

home help back first fref pref prev next nref lref last post

Re: Network Abuse by Netscape? -- Was: Mosaic replacements, etc...

daemon@ATHENA.MIT.EDU (Dave Crocker)
Thu Oct 27 23:50:38 1994

Date: Fri, 28 Oct 1994 04:41:25 +0100
Errors-To: listmaster@www0.cern.ch
Errors-To: listmaster@www0.cern.ch
Reply-To: dcrocker@mordor.stanford.edu
From: dcrocker@mordor.stanford.edu (Dave Crocker)
To: Multiple recipients of list <www-talk@www0.cern.ch>

Overall, I am astonished by the current furor over the attempt to get
better-perceived user performance.  The Web has some design characteristics
which make good performance difficult.  Namely, all the connection opening.

Overlapping i/o requests is a time-honored approach to improving performance.

On the other hand...

At 12:34 PM 10/22/94, Brian Behlendorf wrote:
>you are totally optimizing for people on the slow end of a 14.4 modem,

overlapping doesn't always help.

My eperience living on the end of a 14.4 modem suggests that MAYBE two
simultaneous transfers work well, but I don't think so.  Certainly not
more.

The problem is that the congestion control mechanisms in TCP aren't
sufficiently sensitive to "coordinate" the consumption of such a small
pipe.

d/

--------------------
Dave Crocker
Brandenburg Consulting                          Phone:  +1 408 246 8253
675 Spruce Dr.                                  Fax:    +1 408 249 6205
Sunnyvale, CA  94086               Email:  dcrocker@mordor.stanford.edu



home help back first fref pref prev next nref lref last post