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Re: Speed Impact experiment on GCJ


On Thu, 16 Feb 2006 07:23:02 +0000, Andrew Haley wrote:

> 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?

Sent via email as gmane (which I use for this list) was down. Please post
results for gcc 4.x. :)

Holger



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