[squid-users] Regex optimization

[Alfredo Rezinovsky]

A small quantity of big regexes performs well. The CPU load is the same as
if there's no regex at all.

The thing I don't understand is why this specific regex matches every uri I
throw at it in squid, but not in linux grep, or regex101.com.

The generation of the big regexes takes seconds and is done only once.
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