Learning JavaScript

Below is reference material about JavaScript that is recommended for learning about performance, good practices and advanced patterns.

Basics
Just got started learning to program, or want to start now? Then these may be more relevant for you instead.

Performance optimisation

 * Optimization killers in V8: Pitfalls the bluebird library encountered.
 * Grokking V8 closures for fun (and profit?) (September 2012), @mraleph. See http://mrale.ph/ for more resources that give a good understanding of how V8 optimizations work internally.
 * v8-perf: Notes, slides and videos about inner workings of V8 (including GC and JIT).
 * "Not optimized" warnings explained (2014), Paul Irish, Chrome Dev Tools

ECMAScript 6
Learn about the next version of the ECMAScript standard (which JavaScript implements).


 * ES6-learning: An overview of resources about ES6.
 * New OOP features in ES6 (December 2014), Dr. Axel Rauschmayer