About the Authors

Stoyan Stefanov is a Facebook engineer, author, and speaker. He talks regularly about web development topics at conferences and his blog www.phpied.com, and also runs a number of other sites, including JSPatterns.com—a site dedicated to exploring JavaScript patterns. Previously at Yahoo!, Stoyan was the architect of YSlow 2.0 and creator of the image optimization tool Smush.it.

A "citizen of the world", Stoyan was born and raised in Bulgaria, but is also a Canadian citizen, currently residing in Los Angeles, California. In his offline moments, he enjoys playing the guitar, taking flying lessons, and spending time at the Santa Monica beaches with his family.

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