Re: libregex library

From: Sean Chittenden (sean_at_chittenden.org)
Date: 11/21/04

  • Next message: M. Warner Losh: "Re: libregex library" 
    Date: Sun, 21 Nov 2004 10:06:03 -0800
To: des@des.no (Dag-Erling Smørgrav)

    >> Has there been any thought given to moving to the modified Henry
    >> Spencer regex library used in NetBSD & OpenBSD's libc?
    >
    > des@dwp ~% head -3 /usr/src/lib/libc/regex/COPYRIGHT
    > Copyright 1992, 1993, 1994 Henry Spencer. All rights reserved.
    > This software is not subject to any license of the American Telephone
    > and Telegraph Company or of the Regents of the University of
    > California.

    I think maybe what Ben was referring to was that Spencer has released
    an updated version of his regexp library that doesn't penalize wide
    character locales. I believe our current one performs terribly on
    everything but one byte character sets, whereas the newer Spencer
    library performs as well as one could hope with wide characters. The
    PostgreSQL group did some testing and found Spencers library to be the
    fastest wide character regexp engine while still maintaining very good
    levels of performance for single byte character sets. You'll have to
    check the PostgreSQL archives for details: it's been two years since
    that change was committed to their tree. -sc 

    -- 
Sean Chittenden
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  • Next message: M. Warner Losh: "Re: libregex library"

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