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From: =?UTF-8?Q?Fr=C3=A9d=C3=A9ric_Gava?= <frederic.gava@wanadoo.fr>
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Subject: Re: [Caml-list] Memory allocation nano-benchmark.
Date: Thu, 10 Feb 2005 18:56:54 +0100
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Peraps test the following code (I do not have test it)
>   let tmp1=Array.create tablesize 0 in
>   let tmp2 = Array.create tablesize (Array.copy tmp1) in
>   let table = Array.create tablesize (Array.copy tmp2) in
>       for i = 0 to tablesize - 1 do
>       for j = 0 to tablesize - 1 do
>       for k = 0 to tablesize - 1 do
>        table.(i).(j).(k) <- (i+1)*(j+1)*(k+1)
>      done done done
> (copy are used to not have the same arrays )
Oups !!!!
The "Array.copy"  is here a bug because we would do not have copies of the
arrays. A better code would be:
 let table = Array.create tablesize [| [| |] |] in
  (* modify the array table to not have arrays*)
  for i=0 to tablesize - 1 do
      table.(i) <-   (  let tmp=Array.create tablesize [||]  in
                             for j=0 to tablesize -1 do
                              tmp.(j) <- Array.create tablesize 0
                           done;
                           tmp)
 done;
(* create the good values *)
       for i = 0 to tablesize - 1 do
       for j = 0 to tablesize - 1 do
       for k = 0 to tablesize - 1 do
        table.(i).(j).(k) <- (i+1)*(j+1)*(k+1)
      done done done

I do not have test this code (I do not used my computer) but it does not
create closures.

Regards,
Frédéric Gava