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Re: Speed Impact experiment on GCJ


Holger Hoffstaette writes:
 > On Wed, 15 Feb 2006 18:22:02 +0000, Andrew Haley wrote:
 > 
 > > Holger Hoffstaette writes:
 > >  > 1.6 build, because that will make the 1.5 test look slow. :-) The one
 > >  > thing where gcj used to have a very clear advantage was
 > >  > interface-method invocation since before 1.5 that used to be up to 10
 > >  > (!)  times slower than direct method invocations; this was reduced to a
 > >  > factor of ~1.8 in 1.5 and completely optimized away in Mustang.
 > > 
 > > Err, how do they do that, then?  Is there a paper somewhere?
 > 
 > Sorry, not that I know. I more or less discovered this by accident too..

Hmm.  I wonder if they're devirtualizing interface calls.  Can you let
me see the benchmark?

TVM, 
Andrew.


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