[boost] [1.35] using binary_oarchive instead of text_oarchive

Dear members, I'm trying to use binary_oarchive instead of text_oarchive because I expect using binary may decrease the size of archive compare to using text_oarchive. std::ostreamstream ostr; boost::archive::text_oarvhice oa (ostr); oa & foo; The codes above works fine and I could do deserialization as well without any problem. In this case if I want to use binary_oarchive, what codes should I have to add? Any suggestion or advice will be appreciated. Thank you very much at all time. regards, -- Alexander Dong Back Kim