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Date: Wed, 25 Jan 2006 10:07:29 +0100
From: Marcin Jessa <lists@yazzy.org>
To: James Ryan <james@infinityprosports.com>
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Cc: freebsd-isp@freebsd.org
Subject: Re: php app to test bandwidth speeds ...
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On Tue, 24 Jan 2006 16:18:52 -0600
James Ryan <james@infinityprosports.com> wrote:

> Marc G. Fournier wrote:
> >=20
> > Something like:
> >=20
> >     http://www.testmy.net
> >=20
> > That I can run on my own server(s) ...
>=20
> Are you wanting to test the bandwidth of clients accessing your web=20
> site(s)?
>=20
> If so, what I have done in the past is generate a ~100-500k graphic
> in ImageMagick/Photoshop/GIMP/etc with lots of added colored noise
> (so it cannot be compressed well).  You can either use JavaScript or
> PHP to track the timestamps of when the graphic is first requested
> and when it is downloaded.  So long as you load the image inside a
> non-visible tag, the client won't see it...
>=20
> Not saying this is the best way, but its the easiest and it has
> worked for me.


This is the most common way of meassuring visitor's link speed.
We've a couple of sites in Norway offering such tests for free:
One is with Java and one without:
http://www.dinside.no/php/art.php?id=3D94158
('Nedlasting' is downloading, 'opplasting' is uploading)

Another one:
http://www.itavisen.no/services/speedometer/index.php
Click on "TRYKK HER FOR =C5 STARTE TESTEN!"
"Nedlastingshastighet:" shows you your download speed.

The smart thing is you can include a sponsored image in your test.
Those meassurements are of course innacurate but work pretty ok for
most of the time.

Cheers,
Marcin.