[retroforth] Re: Reva 5.0.0.6 released
- From: Chris Walton <chris.r.walton@xxxxxxxxx>
- To: retroforth@xxxxxxxxxxxxx
- Date: Fri, 28 Jan 2005 17:38:01 -0800
On Fri, 28 Jan 2005 16:06:15 -0800 (PST), Ron Aaron <ron@xxxxxxxxxxx> wrote:
>
> On Fri, January 28, 2005 15:50, Chris Walton said:
> > On Fri, 28 Jan 2005 09:55:33 -0800 (PST), Ron Aaron <ron@xxxxxxxxxxx >
> > wrote:
> >> On Fri, January 28, 2005 9:05, Helmar Wodtke said:
> >>
> >> > Well, very good. I want to explain what I mean with "self-reflective".
> >>
> >> Yes, for turnkey it's a good thing.
> >>
> >> I was going to add a field which says explicitly how big the word is so
> >> that
> >> 'see' could actually work correctly in all cases.
> >>
> >> > I use in HelFORTH a strategy that makes it possible to clone the FORTH
> >> core in
> >> > it's own segment. This is fine to play with :) You can start one system
> >> that
> >>
> >> I need to do something like that for Reva...
> >>
> >> > I'm currently a little bit back from this idea. I used it some years ago
> >> for a
> >>
> >> I was considering hashing. But the regular lookup is quite fast enough for
> >> my
> >> purposes. But when I have a 'real' app on Reva, then I will know if it's
> >> fast
> >> enough.
> >
> > It wouldnt be worth the effort, memory, or overhead, because you're
> > never gonna have more than a few hundred of items in it anyway,
> > compared to gforth or win32forth or quest32 that have thousands.
>
> Another possibility is to use an array of entries. Traversal then only
> involves something like
> mov edx, [ebx+4*ecx]
> inside a loop (so ecx is decrememented automatically). Then each iteration is
> looking at the previous entry in the array of entries.
>
> Hmm. That means the dictionary entries would look like:
> dd xt
> dd ptr-to-name
>
> and somewhere else
> ptr-to-name: db len, name
>
> I wonder if this would be faster or more efficient than the linked list?
It should be. Colorforth does it like this.
> --
> My GPG public key is at http://ronware.org/
> fingerprint: 8130 734C 69A3 6542 0853 CB42 3ECF 9259 AD29 415D
>
>
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