Re: [Squeak-VMdev] Versiojn 4 changes

[Tim R. <ti...@su...>]

Does anyone recall the claimed reason for 'internalising' the method
lookup/activation stuff? It seems pretty pointless to me, sitting here
staring at it. I feel sure it must be giving the poor C compiler
coniptions to have so much cruft in a single loop, probably leading to
register allocation indigestion.

So far as I can see the only cost to having them external is the
internalize/externalize SP/IP code and that's a couple of storage
instructions. The only code I can see particularly benefitting from
being 'internal' is the quickreturn prims which use
internalPop:thenPush: - but changing them to external status would only
involve referring to the global SP/IP and IIRC all of us are using the
global vars in an array now which speeds that up.

Maybe I'll try it out in my copious spare time.

tim
--
Tim Rowledge, ti...@su..., http://sumeru.stanford.edu/tim
Useful random insult:- A Neanderthal brain in a Cro-Magnon body.