Basically I want to make a dynamic typing subsystem in D. I want to take a given object of a static type, construct a dynamic interface for it and later use that interface to event handling. To construct a dynamic interface, I need to extract the virtual methods without resolving them prematurely.
On Fri, May 4, 2012 at 1:11 AM, Steven Schveighoffer <schvei...@yahoo.com> wrote: > On Thu, 03 May 2012 16:57:01 -0400, deadalnix <deadal...@gmail.com> wrote: > >> Le 03/05/2012 22:22, Gor Gyolchanyan a écrit : >>> >>> That workaround is pretty obvious, but I can't afford to make an extra >>> call every time. This event system is supposed to be ultra-fast. Isn't >>> there a way to get to the vtable etry itself? >> >> >> 1/ Such a trivial thing is surely inlined by any compiler with >> optimizations on. > > > I wouldn't count on it. You can't inline a lambda that is used somewhere > it's not declared. > > >> 2/ You can afford a virtual dispatch, but can't afford a function call ? > > > In my experience, virtual calls are nearly as cheap as normal calls. But > doubling the function call setup/teardown/call is not insignificant. It all > depends on how much time is spent in the function being called. > > >> I do think you are in case of premature optimizations here. > > > This is very likely, it all depends on what you are doing *inside* the call. > > -Steve -- Bye, Gor Gyolchanyan.
