On Mar 31, 2004, at 5:02 PM, Andreas Raab wrote:

>  The same for primitive dispatch - it's because
> of Apple not getting their act together with defining a decent ABI  
> that the
> VM uses a case statement although it can be shown that on *every*  
> platform
> having a reasonable ABI a function-through-pointer call just about  
> *doubles*
> the primitive dispatch speed.

I'll note that the os-x version does the gcc jumptable stuff, but  
you're referring to the primitive dispatch stuff.

  The gcc jumptable stuff btw  has a powerpc specific hack to improve  
things by 1 clock cycle...

As for CodeWarrior if someone wants to spring for $299 USA
price for the CW update then I believe that compiler version fixes the  
bug I reported a few
years ago that enables you to do the case statement goto hack. I prove  
this worked on a smaller
case statement, but ran into an optimization compiler failure with my  
older version of CW. At the time
I was able to open an official bug with metrowerks and ship them a  
Squeak VM to compile. They
did fix the bug and rolled that into I believe the latest compiler.

--
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John M. McIntosh <johnmci at smalltalkconsulting.com> 1-800-477-2659
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