regex performance

From: Paul Dubuc (pdubuc_at_[hidden])
Date: 2002-04-12 17:38:09

I'm doing some performance comparisons between Rogue Wave's Regexp class
(http://www.roguewave.com/support/docs/tlsref/rwcregexp.cfm) and
boost::regex using simple expressions like "^metal.*" and "[0-9]+" with
regex_search().  regex is slower by a factor of 6, measuring cpu time
(on a SunBlade 100 runing Solaris 8).  Is there anything I can do to
speed it up?  I tried using different values of
boost::regbase::flag_type_  to adjust how the regular expressions are
interpreted, but with little effect.  Any other ideas? (I'm using
boost_1_27_0.)

Thanks,
-- 
Paul M. Dubuc