Efficient JavaScript code

http://userjs.org/help/tutorials/efficient-code
Table of contents

• Fast loops
• Referencing elements
• String matching
• Create once, use repeatedly
• eval is evil
• Only listen to what you need
• Avoid running unnecessary code
• Timers take too much time
• Take a short circuit
• Reduce reflow
• Assign multiple styles

具体可以直接看链接文章。