SpeedTest

SpeedTest is a set of PHP and Java programs that allow you to measure the performance in terms of bandwidth of your Internet access. By installing it on their web servers, service providers can show their customers how fast their Internet access is. The bandwidth is calculated by measuring how long it takes to transfer blocks of data of various different sizes between the web browser and the web server. This method works reasonably well for relatively slow links (DSL-class links). However, do not expect it to yield reasonable results on high speed links.