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Hello Everyone:

We are back with the first Bayjax meetup of the new year at Yahoo!. This month we are bringing you an extraordinary lineup of speakers on JavaScript performance. In celebration of the newly released book High Performance JavaScript Yahoo! front-end engineers Nicholas Zakas, Matt Sweeney, Julien Lecomte, Stoyan Stefanov, and Ross Harmes will be covering some of the most relevant topics, tools, and techniques for producing screamingly fast web applications.


Title: High performance JavaScript
Where: Yahoo! HQ - @URLS Main cafeteria
701 First Ave, Sunnyvale Ca, 94089


Stoyan Stefanov on DOM Scripting - building responsive UIs by understanding the price of DOM access, updates, reflows and repaints
Nicholas Zakas on Response Interfaces - When written incorrectly, JavaScript can slow down an entire page’s user interface. Learn how JavaScript is tied to a web page’s UI, the limits that browsers place on JavaScript execution, and how to ensure a fast and responsive UI.
Ross Harmes on Ajax - A quick introduction to Multipart XHR, it's strengths and it's (possibly fatal) weaknesses.
Julien Lecomte - Emphasis on JavaScript build systems and it's importance
Matt Sweeney - I'll be introducing the Tools chapter, which walks through a suite of tools to help developers identify various types of bottlenecks in their system.

About the authors:

Nicholas C. Zakas is the lead frontend engineer on the Yahoo! home page, a YUI contributor, and author of Professional JavaScript for Web Developers and the newly-released, High Performance JavaScript.
Matt Sweeney - YUI Architect and developer.
Ross Harmes is a frontend engineer at Flickr, and author of Pro JavaScript Design Patterns.
Julien Lecomte is a senior software engineer in the Yahoo! Search frontend team and YUI contributor
Stoyan Stefanov ( ( is a front-end performance engineer at Yahoo! Search, book author (Object-Oriented JavaScript), co-creator of the image optimizer, YSlow 2.0 architect, Santa Monica beach bum and guitar virtuoso wannabe