YSlow 2.0

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

About the presenter ,[object Object],[object Object],[object Object],[object Object]

The importance of performance ,[object Object],[object Object]

The importance of performance ,[object Object],[object Object],[object Object],[object Object]

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

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

Front-end performance ,[object Object],[object Object],[object Object]

Exceptional Performance at Yahoo! ,[object Object],[object Object],[object Object],[object Object],[object Object]

Best practices ,[object Object],[object Object],[object Object]

Lossless image optimization http://smush.it

YSlow 1.0 ,[object Object],[object Object],[object Object],[object Object]

YSlow 2.0 ,[object Object],[object Object],[object Object],[object Object]

Rules ,[object Object],[object Object],[object Object],[object Object],[object Object]

A new rule ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The pool ,[object Object],[object Object],[object Object]

Grading algorithm 1.0 ,[object Object],[object Object],[object Object]

Grading 2.0 ,[object Object],[object Object],[object Object]

Warning! ,[object Object],[object Object]

Ruleset ,[object Object],[object Object],[object Object],[object Object]

Share the new algo ,[object Object]

Sharing the .xpi ,[object Object],[object Object]

New Ruleset ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Logic ,[object Object],[object Object],[object Object],[object Object],[object Object]

Tools 2.0 ,[object Object],[object Object],[object Object]

Import/export ,[object Object],[object Object],[object Object],[object Object]

Extensible tools ,[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

APIs ,[object Object],[object Object],[object Object]

Code organization ,[object Object],[object Object],[object Object]

Code quality ,[object Object],[object Object]

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)

An extension to YSlow can: ,[object Object],[object Object],[object Object],[object Object],[object Object]

New rules in YSlow 2.0 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Stoyan Stefanov [email_address]

YSlow 2.0

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YSlow 2.0