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Editorial Team
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Asked: 2026-06-06T12:27:31+00:00

I am using PCRE |^/foo/(.*?)(?::(?:bar)?)?$| or |^/foo/(.*?)(?::bar)?:?$| this will be a replace so we

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I am using PCRE|^/foo/(.*?)(?::(?:bar)?)?$| or |^/foo/(.*?)(?::bar)?:?$| this will be a replace so we want to strip : and :bar from the end while doing the replacement. I know the two are not exactly the same but it does not matter much here.

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  1. Editorial Team

    I would use the first one as it only has to check for : once. The second one could match the first three characters of :bat before having to backtrack, then check for : again. Also, the second one could match :bar: whereas the first one can’t. The actual speed difference would be tiny. The second way would be better written as /^\/foo\/(.*?)(?::bar|:)?$/

    Try not to use regex metacharacters as delimiters!

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