caculate user download speed

[bart]

i want to calculate a user download speed.
what would be the best way, let a java script calculate it?, or let php do
it?
i was thinking of using an image as testfile.
with php i could send the image data with a stream(add a no-cache header
with it)

bart

[CountScubula]

Re: caculate user download speed

1 month or so ago, I did some tests

http://www.gzentools.com/snippetview.php?c=Concepts&v=speedtest.php

actual link is here

http://www.gzentools.com/test/speedtest.php

--
Mike Bradley
http://www.gzentools.com -- free online php tools
"bart" <bart@thatissec ret.nlm> wrote in message
news:4058d446$0 $575$e4fe514c@n ews.xs4all.nl.. .[color=blue]
> i want to calculate a user download speed.
> what would be the best way, let a java script calculate it?, or let php do
> it?
> i was thinking of using an image as testfile.
> with php i could send the image data with a stream(add a no-cache header
> with it)
>
> bart
>
>[/color]

[Chung Leong]

Re: caculate user download speed


Uzytkownik "bart" <bart@thatissec ret.nlm> napisal w wiadomosci
news:4058d446$0 $575$e4fe514c@n ews.xs4all.nl.. .[color=blue]
> i want to calculate a user download speed.
> what would be the best way, let a java script calculate it?, or let php do
> it?
> i was thinking of using an image as testfile.
> with php i could send the image data with a stream(add a no-cache header
> with it)[/color]

Depends on how sophisticate you want the test to look. A pure server-side
solution is simpler to code, since you don't need to deal with browser
issues. On the other hand your visitor might end up staring at a blank
screen for a few seconds (or longer). McAfee has something like that:

http://promos.mcafee.com/speedometer/testing.asp

With client-side + server-side approach you can deliver a slicker interface,
but is harder to write. I fancy something like this: in an invisible iframe,
a PHP script would output a large number of white spaces. Every now and then
a <script>parent. ontransfer([# of bytes sent]);</script> gets toss in. The
Javascript function (back in the main page) updates the UI with statistics
and progress info. There'd be a cancel button for canceling the test.