This document provides tips for improving JavaScript performance including using string builders in loops, caching values that don't change, using anonymous functions, reducing reflows by changing styles with classes instead of directly on elements, and using DocumentFragments to insert elements to avoid multiple reflows. It also recommends using delegation instead of switch statements and for event handling, and provides a link to a slide presentation on extreme JavaScript performance.

1. JavaScript Performance Tips

2. String Builder

3. Loop

4. Cache

5. Anonymous function

6. Reflow (order)

7. Reflow (style class)

8. Reflow (DocumentFragment)

9. Instead of switch

10. Delegate (HTML)

11. Delegate (code)