Re: [boost] [xpressive] Performance Tuning?

Subject: Re: [boost] [xpressive] Performance Tuning?
From: Joel de Guzman (joel_at_[hidden])
Date: 2009-07-19 10:46:21

John Bytheway wrote:

> string::begin() return a non-const reference?), but anyway.  Here are
> the icc results (Intel Core2 Quad 2.83GHz, Gentoo):
> 
> Loop count:  10000000
> Parsing:  42.5
> xpressive:  4.28591
> spirit-quick(static):  1.4721
> spirit-quick_new(threadsafe):  1.46949
> spirit-grammar(threadsafe/reusable):  1.59846
> 
> and gcc-4.4.0:
> 
> Loop count:  10000000
> Parsing:  42.5
> xpressive:  3.62948
> spirit-quick(static):  1.02657
> spirit-quick_new(threadsafe):  1.00637
> spirit-grammar(threadsafe/reusable):  1.01748
> 
> gcc 4.3 is still ICEing.

Those are good numbers. It shows that the effect of the
virtual function call of the spirit grammar rules is obviated
out of existence!

For the record, this one shows the xpressive code using spirit
numeric parsers to convert the string to numbers, right?
Will the original OP please (PLEASE!) come forward and post his
original hand-coded program? This is SOOO confusing!

Regards,
-- 
Joel de Guzman
http://www.boostpro.com
http://spirit.sf.net