[thelist] PHP help wanted & fonts tip

Alex Bainbridge alex.bainbridge at travelucd.com
Mon Oct 28 07:23:25 CST 2002

Hi all,

I am afraid to say that the example Jay just gave re connection time
calculations is not correct.

To correctly calculate download time:

1) Remember file size is in bytes, connection speed is in bits

2) 1 kilobit = 1000 bits
   1 kilobyte = 1024 bytes
   1 byte = 8 bits


>If you want to code in PHP then you can get the file size and divide it by
>known connection speeds. So if you have a file that is 86Kb;

>28Kbps connection - 3.07 seconds
>33Kbps connection - 2.61 seconds

86 kilobyte file is the same as 88,064 bytes
then multiply by 8 to get bits, which is equal to 704,512 bits

28.8 Kbps connection = 28,800 bits per second

Divide 704,512 by 28,800 you get 24 seconds.... which is not quite the same
as 3 seconds as Jay pointed out earlier...

As Jay correctly points out, this is theoretical speed.

kind regards


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