Re: [boost] [math] pow redux and observations

From: Simonson, Lucanus J (lucanus.j.simonson_at_[hidden])
Date: 2008-05-22 15:49:41

John Moeller wrote:
>One more thing.  The argument is passed by value, which is ok for
builtins.  
>Will all those potentially excess temporaries be an issue for larger
UDTs?  
>Perhaps the argument type of result() should be wrapped so that it's a
>const 
>reference if it's larger than a pointer.

It may be best to simply pass all arguments types by const reference in
this instance.  When instantiated then inlined the function call
overhead related to making temp-copy of the argument doesn't need to be
stripped away by the compiler during subsequent optimization, which can
make it easier for the compiler to identify that it is a good idea to
inline the function in the first place.  There is no real draw back to
passing a built in type by const reference, particularly if your
intention is for the compiler to inline the function anyway.

Luke