Speed Impact experiment on GCJ

Thu Feb 16 07:21:00 GMT 2006

Holger Hoffstaette writes:
 > On 2006年2月15日 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.