Tools of the Trade

File this one under website tools. Website download
optimization seeks to minimize the wait users have when
visiting your site. You can go to this
site here
, enter a URL, and it will calculate how long your
page takes to load, depending on the speed of connection. So,
for example, you can see how long it takes for poor soul using
28.8K modem versus a T1. In addition, it gives some
recommendations on how to speed up downloading (if needed).

For those interested, below are the results for this
page:

Speed Time
14.4K 37.33 seconds
28.8K 18.76 seconds
33.6K 16.11 seconds
56K 9.75 seconds
ISDN 128K 3.12 seconds
T1 1.44Mbps 0.45 seconds

*Note that these download times are based on the full
connection rate for ISDN and T1 connections. Modem connections
(56Kbps or less) are corrected by a packet loss factor of 0.7.
All download times include delays due to round-trip latency
with an average of 0.2 seconds per object. With 6 total objects
for this page, that computes to a total lag time due to latency
of 1.2 seconds. Note also that this download time calculation
does not take into account delays due to XHTML parsing and
rendering.

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