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