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Re^3: alternation in regexes: to use or to avoid?by dave_the_m (Monsignor) |
on Dec 10, 2012 at 19:40 UTC ( [id://1008157]=note: print w/replies, xml ) | Need Help?? |
Actually I stand corrected: the fixed string prefixes are collected together into a trie where there are (possibly differing) wildcard suffixes; the killer is the individual captures, which disables the trie optimisation.
So, alternation is the fastest, as long as you put any captures outside the alt. Dave.
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