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[Caml-list] Caml Machine and GP
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Date: 2003-07-23 (19:05)
From: Lukasz Stafiniak <l_stafiniak@h...>
Subject: [Caml-list] Caml Machine and GP
Hi precious List!

I work on genetic programming with typed terms. I would like to use
OCaml bytecode-system to run my programs.

Evaluation scheme I've used so far: variables by de Brujin indices,
beta-reduction by substitution, recurrence by rational trees (with
mutable reference cells filled when first encountered in
evaluation). I wonder how much of a speedup could I get? -- I guess
MUCH. How big are the overheads? I guess for not computationally
involved tasks evaluation would be still better, due to the
overheads (but these dont give the kicks).

How should I do this? Look around in Toplevel, use the path:

Translcore.transl_exp --> Bytegen.compile_phrase -->
Emitcode.to_memory --> Meta.reify_bytecode?

Say, I put a function in Typedtree.expression at one side, and get the
result at the other side? How about treatment of types -- do I need to
supply them?  My terms are typed, but this would involve translating
types as well, unnecessarily. More -- how to call functions from
outside (perhaps use the environment argument -- what to put
there)... Best way to learn these things is reading the source, I
guess? Can I catch exceptions from code run this way -- I guess I can,
Toplevel does it probably.

I also welcome Hi! responses from people interested in genetic
programming. I plan to feature (type-based or some other) termination
of my programs, and I've developed some generalization algorithms to
use in "intelligent" recombination.

Best wishes,
Lukasz



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