Stoyan Stefanov

Stoyan has recently joined Etsy as a web performance consultant (formerly at Facebook, WebPageTest and Yahoo!). He has a storied history as an accomplished author, contributor, and custodian of the well-known and respected Planet Performance calendar. He habitually speaks about web development topics at conferences and on his blog at phpied.com (http://phpied.com/). Stoyan is also the creator of the smush.it (http://smush.it/) image optimization tool, YUI contributor and was the architect of Yahoo's performance optimization tool YSlow 2.0.