Note: You were using capturing parens ((...)) when you only needed non-capturing parens ((?:...)). Removing the need to capture greatly improves the speed of regexs.
Thanks for this. Thing is, I have an entire module full of this mistake. Unless there is a pragma to fix this, then I have to go fix them all manually.

Ivan Raikov says: the first step to understanding recursion is to begin by understanding recursion.

In reply to Re^2: regexp - repeatedly delete words expressed in alternation from end of string by princepawn
in thread repeatedly delete words expressed in alternation from end of string [regexp] by princepawn

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