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Speed testing my website and/or target range for content size (in kb)?

 
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I'm trying to add a lot of javascript magic to my web app where I'm using prototype.js (http://www.prototypejs.org/), modal dialog controls js/css controls, and effects from http://script.aculo.us/ .

I'm quickly noticing that in a blink of an eye I'm going to have 160kb of .js files downloading.



It's also a java web app so there will be a good amount of dynamic content needing to load, plus probably another 150kb worth of images.

It's not a HUGE concern that 56k dial up users will be kind of slow but if I can slim some of this stuff up that'd be nice.

Is there a target # of kb that one should try to stay under to easily service 56k users? or high speed users?

Is there an easy method I could simulate being on a 56k modem, or a website out there that will test how long it takes a 56k user to download the site on average?

Thanks,
Aaron
 
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The hit for users is the first time they come to the site. After that it is cached.

There is no target kb number out there. If you saw how many kbs of JS I have on my site you would run in fear.

Look at compression and gzip

Eric
 
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