this, is boomerang
http://hacks.bluesmoon.info/boomerang/doc/

Medición de rendimiento de sitios web

A tool that helps determine not just response and performance, but helps with client side "perceived" performance. Which can be two different cases.

boomerang is a piece of javascript that you add to your web pages, where it measures the performance of your website from your end user's point of view. It has the ability to send this data back to your server for further analysis. With boomerang, you find out exactly how fast your users think your site is.

Interesting tool allowing measurement of perceived speed of a web site on the client side.

Boomerang measures the performance of your website from your end user's point of view.

boomerang is a piece of javascript that you add to your web pages, where it measures the performance of your website from your end user's point of view. It has the ability to send this data back to your server for further analysis. With boomerang, you find out exactly how fast your users think your site is.

RT @draenews: Del this, is boomerang: http://bit.ly/b08QdK

boomerang - measure performance of your site from your end user's pov - http://bit.ly/dz1vVd