Waterfall Diagram

Waterfall diagrams show how quickly (or slowly) a site responds to a browser's requests, and how fast the corresponding content is transferred. They give you a picture of the load time of each and every element of your site. Perhaps there's a certain external image slowing it down?

Technically, they are HAR files of a transaction sensor that contains a single URL GOTO command like:
"URL GOTO=http://google.com".
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