On 10/26/05, chromatic <[EMAIL PROTECTED]> wrote: > On Wed, 2005-10-26 at 20:29 -0400, Rob Kinyon wrote: > > > I would prefer to use roles as they're closed by default, leaving > > "class" to be my powertool, if I need the power. > > I don't understand this desire; can you explain your reasoning?
If a role is an immutable class, that means that its internals cannot be changed. Hence, the compiler can trust that it will be the same at the end as at the beginning. Which means it's optimized. Which means my objects run faster if I create them from roles than if I create them from classes. And, given that this seems to be the sole difference between them (mutability vs. immutability), why would I use classes as my standard? Rob
