Have you thought of having a look at Jarkko's Regex::PreSuf module? It's main use is to create a regular expression from wordlists using prefix and suffix analysis, which should create a much faster regex than just joining them together.

Not sure how well it works, found it whilst trying to find something else recently so not used it myself.

In reply to Re: Good Idiom for Matching List? by Molt
in thread Good Idiom for Matching List? by John M. Dlugosz

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