this, is boomerang

At LogNormal, we measure the performance experienced by real users. We do that using a JavaScript library called boomerang.

Boomerang was written by our co-founder Philip Tellis while he worked at Yahoo! and Yahoo! released it to the world under the BSD license. LogNormal continues to develop and maintain the boomerang library, making all our improvements available to the rest of the world.

You can fork boomerang from our repository on github at and read the documentation at