2009/8/27 Michał Nowotka
Ok, first of all this isn't answer to my question. Secondly - do you have any performance test to campere these libraries?
I cannot answer if that is pathological or not as I do not know regex that well, but you did mention performance issues, and Spirit2.1 is faster then regex in just about every possible way. Spirit2.1 creates a parse tree at compile time that is fully optimized for what you are wanting to parse, and thus far it is faster at every testing thing, from optimized old price parsers to even being faster then the built-in atoi and similar kin. I do not know the regex syntax perfectly, but based on "(https?://)?([^/@]*[\\.@])?google.com[/\\?&#]*", a similar Spirit2.1 parser might be: -("http" >> -lit('s') >> "://") // equal to the (https?://)? part above
-(*char_("^/@") >> char_(".@")) // equal to the ([^/@]*[\\.@])? part above "google.com" *char_("/?&#") // equal to the [/\\?&#]* part above
That would create the Spirit2.1 parse tree at compile time, and if you wished it could parse out anything using their proper type faster then anything else that has yet been tested. But yes, Spirit2.1 does contain a few benchmarks with it in the docs, and the spirit mailing lists contain a rather large hoard of a lot more of other tests that people have done themselves. The latest Spirit2.1 docs are at: http://svn.boost.org/svn/boost/trunk/libs/spirit/doc/html/index.html The docs are consistently being updated, they are the only part of Spirit2.1 not yet complete, but are being worked on all the time. I need to help with that... >.>