----- Original Message ----- From: "David Abrahams" <dave@boostpro.com> To: <boost@lists.boost.org> Sent: Wednesday, July 16, 2008 4:59 AM Subject: Re: [boost] [flyweight][parameter] is there an interest in thistemplate parameter expresion
This code is much too complex for me to analyze. It would help a lot if you'd strip out any non-correct code, to start with.
One thing I can say up front is that compilation times are a concern and any ease-of-use wrapper should avoid increasing them too much.
Hi, I have attached the files striping any code not needed (and the flyweitht.hpp modified - need BOOST_USE_DSL_EXPR to be defined) You are right, the compilation time is important. I expect the transformations I'm doing can be improved, but my knowledge of the metaprogramming (mpl) is not too deep. I have done the test for the flyweight library (compiling 19 files) WITH BOOST_USE_DSL_EXPR real 1m3.184s user 0m0.015s sys 0m0.015s real 1m3.324s user 0m0.015s sys 0m0.031s WITHOUT BOOST_USE_DSL_EXPR real 0m48.828s user 0m0.046s sys 0m0.000s real 0m48.382s user 0m0.015s sys 0m0.031s The compilation takes more that 30% with this wrapper. Vicente