I see your point and I suspected you spoke according to your experience. I am 
just trying to make people innovate, in my own way.

Another thing. Keeping the VM small will definitely help when moving to a 
different executing platform. It would be amazing to have the Pharo running on 
Javascript VM. 

Alexandre


> Ok, I very much understand this point of view. That's exactly why I started 
> Pinocchio.
> 
> I'm currently building my 4rd iteration. I started building a Smalltalk by 
> having AST evaluation (actually I started out with self-evaluating AST 
> objects that got evaluated by sending message... :D) . Then moved on to 
> stack-based bytecodes. Then moved on to registered-based bytecodes (where I 
> am now). All of my progress has been made by careful scrutinizing of the 
> problems at hand. I did reevaluate and question all steps; and I'm a bit sad 
> that I ended up doing it this way... But then I guess there is some 
> inevitability in it.
> 
> For example the register-based bytecodes, I had no idea that what I was doing 
> were register-based bytecodes until I read the Lua VM description and noticed 
> that it was exactly the same.
> 
> However I do think that I learned a lot by doing it. I made the trade-offs 
> myself and understand them a lot better than I did before. What I'm defending 
> in this discussion isn't based on estimates but experience from building it 
> from the ground up.
> 
> And this is where I welcome everyone to do the same! It took me 2 years to 
> get to where I am now, but maybe it goes faster for you ;) It is definitely a 
> very worthwhile exercise. And I think because of it I'm finally at the point 
> where I can contribute something...
> 
> cheers,
> Toon
> 

-- 
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Alexandre Bergel  http://www.bergel.eu
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