Hello,
Does the intel compiler supports NRVO (Named Return Value Optimization)? i.e. cheaply returning big objects by value in function signatures, if so are there examples of how this works?
For example I have a type matrix and I favor the following design and signature for obvious performance reasons:
[cpp]template
class tmatrix {
void tmatrix::multiply(const tmatrix& b, tmatrix& c) const; // confusing and very unreadable
};
// client code
tmatrix a, b, c;
// ...
a.multiply(b, c); // meaning c = a*b[/cpp]
if NRVO is suported then I can rely on the following alternative without any big memory copying performance penalty:
[cpp]template
class tmatrix {
tmatrix tmatrix::operator=(const tmatrix& b) const; // note that returned object is by value!
};
// client code
tmatrix a, b, c;
// ...
c = a*b[/cpp]
TIA,
Best regards,
Giovanni
