Re: Will Java go native?

[Dmitry Leskov]

On Friday, 20 September 2013 at 07:19:44 UTC, deadalnix wrote:

On Friday, 20 September 2013 at 05:31:09 UTC, Dmitry Leskov wrote:

Our AOT compiler does inline virtual calls of non-final methods that are not overloaded in any subclass known at compile time. Of course, there is a runtime check and a backup virtual call, but the check is cheap and code size increase in negligible.

What we don't do (yet) is profile-guided optimizations, but that is on our to-do list.

So basically what you do is :

funptr = load from vtbl;
if (funptr == compile_time_known_value) {
    compile_time_known_value();
} else {
    funptr();
}

Which avoid the indirection if the function is actually called most of the time. Am I right ?

Almost:

funptr = load from vtbl;
if (funptr == compile_time_known_value) {
    // Inlined body of compile_time_known_value() goes here
} else {
    funptr();
}