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[Caml-list] Bigarray access speed
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Date: 2002-08-16 (10:41)
From: Markus Mottl <markus@o...>
Subject: Re: [Caml-list] Bigarray access speed
On Fri, 16 Aug 2002, malc wrote:
> Bigarrays(of at least floats) can have a slight edge over normals arrays.
> To get maximal speed of the inner loops data needs to be naturally 
> aligned. OCaml does nothing to enforce it for non-big arrays. Bigarrays on 
> the other hand are mmaped(4k on IA32) and you get perfectly aligned data 
> for free. I was thinking that maybe Array can be extended with
> make[create]_aligned, for speed/space tradeoff.

Additionally, it would also be nice to have a specialized "create"
function for (naturally unboxed) float arrays such that they need not
be initialized with a given float value. This may be beneficial for
algorithms that allocate work space whose contents is not necessarily
fully needed but filled on demand.

Markus Mottl

Markus Mottl                                             markus@oefai.at
Austrian Research Institute
for Artificial Intelligence                  http://www.oefai.at/~markus
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