I came away with a handy Javascript speed tip from an interesting post on Stack Overflow yesterday. Commonly you will see the following syntax for a self-invoking function in Javascript:
As it turns out, you can replace the function wrapping parenthesis with a leading bang:
Results from a jsperf.com benchmark test show that this is 9% faster than using parenthesis. Awesome!
Nice tip! I believe you can also use a semicolon.