Re: Classpath build process and VM-specific issues

[David P Grove]

> I would be interested in a quick poll of VM implementors
using Classpath:
> do you care more about having fewer diffs with "stock" Classpath
or
> modifying & optimizing your VM's core classes to eke out optimal
> performance?

Both of course ;-)

More seriously, I'm a little cautious when thinking
about introducing an extra level of object instances in performance critical
classes (or classes which have a lot of instances at runtime), but an extra
level of static (or final virtual) calls should never be an issue.  If
you're in the performance game, your inliner has to eat up this kind of
stuff with no problems, otherwise you have absolutely no chance of dealing
with the application code.

Effective automatic object-inlining (to optimize away
levels of redundant objects) is still very much bleeding-edge research.
 Effective automatic inlining of static and virtual function calls
is old, well-known technology and you have to do it and do it well to be
in the OO performance game.

--dave