qobject_cast

[Olivier Goffart]

Le Samedi 12 Novembre 2005 12:48, Dirk Mueller a écrit :
> On Saturday 12 November 2005 11:18, Olivier Goffart wrote:
> > After having doing some test, it seems that qobject_cast is 3 times
> > faster than dynamic_cast.
>
> that heavily depends on the compiler ;) The main difference is that
> qobject_cast more often works accross DSO boundaries, even if LTDL_LOCAL is
> used for dlopen'ing the module.

I don't understand that. I don't even know what LTDL_LOCAL is.

> also, dynamic_cast works in more cases than qobject_cast works (which
> relies on the types inheriting QObject iirc).

yes,  qobject_cast  only work with QObject deviated that have a QMetaObject.
But that's almost the case of all QObject anyway.

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