Dispatch
 Usage
Notes
 Further Examples
Evaluate all of the following cells to generate timings for your computer. Here is a list of  rules.
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Here are the first  rules of ordinaryrules.
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This sets up a dispatch table that makes these rules faster to use.
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You can apply either ordinaryrules or dispatchrules using the slash-dot operator /. (ReplaceAll).
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The dispatch rules go through all the rules significantly faster.
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This makes the table of rules four times as long and again sets up the corresponding dispatch table.
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The time using dispatchrules is not very different, while the time to do replacements with ordinaryrules increases significantly.
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See also the Further Examples for Complement.
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