I've no idea what you mean by "to match hundreds of regular expressions against one text in O(lg(x))". What is x? It surely isn't the length of the text, or the length or number of matches you want to perform, as you will need at least linear time to read in the text and the matches. The abstract you link to doesn't mention this time either.

From what I understand of the abstract, this is a highly specialized technique (and hence, probably not useful as a replacement for Perl regular expressions). Also, the abstract suggests fast searches will be able to be done after doing (a lot of) preprocessing work. That is, you are repeatedly searching the same text. This is not typical for Perl programs. (It's also what "study" was intended to be for).

Seems to me that maybe its time to start thinking about a new Regular Expression Engine for Perl, maybe as an add-on extension, so we don't need to break support to old applications.

Are you volunteering? I think p5p badly needs another person to understand the regexp-engine. The current number of people who have a deep knowledge of the engine can be counted on the fingers of one hand. Patches welcome.

In reply to Re: The Dream of a New, Faster Regular Expression Engine by Anonymous Monk
in thread The Dream of a New, Faster Regular Expression Engine by monsieur_champs

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