Optimization: intern every field on the 'rule' hash. #15
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This is a speculative optimization that converts
rewrite_rule.rbto using symbols instead of strings for therulehash's keys . It should make processing the rules some faint little bit faster.There is some cost to interning the rules, but this is only paid once, at initialization time.
For more information, see also http://stackoverflow.com/questions/8189416/why-use-symbols-as-hash-keys-in-ruby .