YSlow 2.0 Stoyan Stefanov, Yahoo! Inc. Beijing, Dec 6 th 2008

The importance of front-end In FF3 HTML Page: 22%

The importance of front-end In IE6 HTML Page: < 5%

Lossless image optimization http://smush.it

Rules and grading

Rules/ best practices

Algos

Tools and import/export

Tools 1.0

Tools 2.0

JavaScript tools

CSS tools

Import/Export

Extensible tools menu

Development support

Flow diagram

Pool of rule objects “ Yahoo! default” ruleset object “ Personal blog” ruleset object “ SEO” ruleset object L I N T

Contains result objects L I N T resultset HTML renderer <ol> <li>Minimize HTTP requests… JSON renderer

Types of extensions to YSlow 2.0. (summary)

Stoyan Stefanov [email_address]