There is another exclusive excerpt from Andy King’s Speed Up Your Site: Web Site Optimization. This is the conclusion of Chapter 10, Optimizing Javascript for Execution Speed. It talks about an optimized duff’s device for faster loop unrolling, expression tuning, and Flash actionscript optimization.
Looping through variables, while critical to the success of most programs, can be a significant performance drain if not handled properly. In this excerpt, the book discovers how to tune JavaScript loops for the highest possible speed.
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