Olav Junker Kjær takes us through how browser-based JavaScript deals with events and default action, including the dispatch sequence of events, when they are bubbled and captured and the order of these events. Also shows some setTimeout() tricks to deal with long-running JavaScript
Ivo Wetzel covers some of the quirks of the JavaScript language. Some of these cause subtle bugs, some overturn conventional wisdom. It covers toString on numbers. Covers the advanced JavaScript features such as prototypal inheritance, this, closures, anonymous wrappers, type-casting, automatic semicolon insertion and hoisting of function and variable declarations.
John Resig explains JavaScript timers. Because of JavaScript's single-thread nature it is easy to write blocking code that makes pages unresponsive. Timers allow us a mechanism for yielding control back to the browser, queueing the code up to run a little later. John goes into depth on this particular topic.
A BetterExplained article that discusses how to reduce the initial load time of JavaScript files. Covers measuring load times, and a number of approaches to delaying the loading of a JavaScript file. Also covers minifying JavaScript and maintaining a debug version of code. Also covers an AJAX onLoad pattern to dynamically include JavaScript after page load, and HTTP caching of external JavaScript files
As web pages become more and more like applications, code performance becomes more and more important. This article looks at a number of performance issues to avoid, in EcmaScript, DOM and AJAX requests. Covers eval, the with keyword, try/catch in performance-critical code, global variables, implicit object conversion, string concatenation, primitive operations over function calls, repainting and reflowing documents, modifying elements, using XPath.