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Re: find-file-noselect needs save-match-data

From: Richard Stallman
Subject: Re: find-file-noselect needs save-match-data
Date: Thu, 14 Jun 2007 12:19:43 -0400

    >     Anyway, such a function should likely _return_ the corresponding
    >     match-data (rather than setting a global variable to it), and things
    >     like match-beginning should optionally take an argument for this
    >     particular match-data.

    Then what's the advantage compared to using save-match-data?

This function would be simpler, and probably noticeably faster, than

       (string-match X Y)

You have a valid point that this function would be somewhat
slower than a similar function which returned only the position
of the start of the match.  I am not sure whether this speed
difference is significant.  Would someone like to try
implementing those two functions, and see how they compare
in speed to the expression above?

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