Stoyan Stefanov

Stoyan Stefanov

  • @stoyanstefanov

Los Angeles, California

Areas of Expertise:

  • web performance
  • WPO
  • javascript
  • images
  • speed
  • optimization
  • speaking
  • writing
Stoyan Stefanov is a Facebook engineer (a former Yahoo!) and an author, contributor, and tech reviewer of various O'Reilly books. He speaks regularly about web development topics at conferences and on his blog at Stoyan is the creator of the image optimization tool, YUI contributor and architect of Yahoo's performance optimization tool YSlow 2.0.

JavaScript for PHP Developers JavaScript for PHP Developers
by Stoyan Stefanov
May 2013
Print: $14.99
Ebook: $12.99

Web Performance Daybook Volume 2 Web Performance Daybook Volume 2
by Stoyan Stefanov
June 2012
Print: $19.99
Ebook: $16.99

JavaScript Patterns JavaScript Patterns
by Stoyan Stefanov
September 2010
Print: $29.99
Ebook: $23.99

Recent Posts | All O'Reilly Posts

Stoyan blogs at:

5 Surprises for PHP Developers Coming to JavaScript

June 10 2013

PHP programmers often see the familiar C-like syntax of JavaScript and think it’s all flowers and roses. And while trivialities like loops and conditions are pretty much equivalent in both languages, things get very weird very quickly. Let’s take a … read more

Recent Posts | All O'Reilly Posts