Bio blurb and headshot
Stoyan Stefanov is a Facebook engineer, ex-Yahoo, architect of the YSlow 2.0 performance tool and creator of the smush.it image optimization tool.
Stoyan blogs at phpied.com and jspatterns.com and has spoken at conferences and meetups around the world (Velocity, JSConf, OSCON, Web Directions, Fronteers...). He also runs the annual "Planet Performance Calendar" publication.
A Bulgarian-Canadian, Stoyan lives in Los Angeles with his wife and daughters and spends his offline hours biking around the beach and making music (rarely at the same time though).