140bytes

For those of you who haven't heard of code golf, you should check out http://140byt.es/ The point is more to learn more about the language than to make something practical so come at it in a lighthearted way. In this case, the problem is actually pretty damn hard. 140 Bytes is Jed Schmidt's side project where people compete to make useful functions as small as possible. Jed is kind of a Javascript powerhouse and also happens to be a really nice guy. https://github.com/jed https://github.com/jed/140bytes/wiki/Byte-saving-techniques Edited to add.. As a curiosity, Jed might have the most-forked gist on github: https://gist.github.com/962807

Defining variables as parameters saves bytes (", x" vs "var x") but shouldn't increase performance. Passing document into the function saves writing "document" twice or doing a "var d = document". Creating a new script tag with JS lets you get asynchronous script loading for older browsers that don't support the async attribute. Some other ways to reduce bytes are outlined at https://github.com/jed/140bytes/wiki/Byte-saving-techniques