Hi, Why do you need to use Qt signals/slots ? Isn't there something more appropriate to this task ?
2014-06-11 15:36 GMT+02:00 Keith Gardner <kreios4...@gmail.com>: > I have one question to you. Why new syntax of QObject::connect() improve >> performance for a 5%. >> >> I mean that if in code change >> >> connect( sender, SIGNAL( signal() ), receiver, SLOT( slot() ) ); >> >> to >> >> connect( sender, &Sender::signal, receiver, &Receiver::slot ); >> >> then code works faster... Why? May be somebody know the answer, I don’t >> want to read Qt’s code for the answer on this question. >> > > I would guess would be that the first connect is performing a string > lookup and validating the arguments at run time. SIGNAL and SLOT are > taking the macro parameters and turning them into character arrays. > > The second connect is working with function pointers which allows for the > compiler validate their existence and ensure that the arguments are > compatible at compile time instead of run time. > > _______________________________________________ > Interest mailing list > Interest@qt-project.org > http://lists.qt-project.org/mailman/listinfo/interest > >
_______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
