Re: speed of generic code in Ada (vs Java)

[Robert A Duff <bobduff@shell01.TheWorld.com>]

Graham <graham.stark@virtual-worlds.biz> writes:

> In any case, the 5x comparison sounds extreme and probably comes from
> comparing arrays of ints with something from the Java Collection
> classes, which is a bit like comparing Ada arrays with Ada Containers.

I don't see why.  Ada.Containers.Vectors, for example, does not
introduce an extra level of indirection for each component of the
vector.  Ada is more like C++ in that regard.

> Alternatively, if you defined an Integer_Class in Ada with operators
> that allowed it to be used in assigments, I imagine you'd see similar
> performance hits to Java's autoboxing.

Right.  One problem with Java is that in many cases it forces you to
have an extra level of indirection when you don't want it.

- Bob