No matter how much experience you have with JavaScript, odds are you don&;t fully understand the language. As part of the "You Don&;t Know JS" series, this concise yet in-depth guide focuses on new asynchronous features and performance techniques&;including Promises, generators, and Web Workers&;that let you create sophisticated single-page web applications and escape callback hell in the process.

Like other books in this series, You Don&;t Know JS: Async & Performance dives into trickier parts of the language that many JavaScript programmers simply avoid. Armed with this knowledge, you can become a true JavaScript master.

With this book you will:

Explore old and new JavaScript methods for handling asynchronous programming
Understand how callbacks let third parties control your program&;s execution
Address the "inversion of control" issue with JavaScript Promises
Use generators to express async flow in a sequential, synchronous-looking fashion
Tackle program-level performance with Web Workers, SIMD, and asm.js
Learn valuable resources and techniques for benchmarking and tuning your expressions and statements

�ber die Autorin bzw. den Autor:

Kyle Simpson is an Open Web Evangelist from Austin, TX. He's passionate about JavaScript, HTML5, real-time/peer-to-peer communications, and web performance. Otherwise, he's probably bored by it. Kyle is an author, workshop trainer, tech speaker, and avid OSS community member.

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