Re: Thoughts and Opinions or something like that

["Tarjei T. Jensen" <tarjei.jensen@kvaerner.com>]

chris.danx wrote
>The real problem is the VM, so i'm looking for peoples thoughts on this.
What
>concepts would you have found useful, and what you'd rule out.

I would think that a VM would have to be as high level as possible in order
to be efficient. My impression is that there is a growing disparity between
memory and CPU speeds. In order to be efficient it is important to reduce
memory fetches. The VM decoding code should stay in the cache and therefore
be fast.

As far as instructions are concerned I always fancied deviding branch
instructions into two groups: Those who branch most of the time and those
who seldom branch. The idea was that one could skimp on branch prediction on
the CPU. For a while or for loop one would use the former type of
instructions. Since I have heard of nobody who have done this I assume that
the idea is not particularly good.

Greetings,