Good article on Client Side Performance Bottlenecks

The often neglected part of the performance testing is the Client side performance aspects like caching, lesser number of static files, file minification, compression, java script processing time, page rendering, etc.

For rich internet applications with lots of images, videos, etc, the client side aspects have a bigger bearing on the actual response time when compared to the server side response time and should be given due importance.

Here is a link for a good article on this topic from "Impetus".

Identifying Client Side Performance Bottlenecks