From: Christian Szegedy <szegedy@t-online.de>
To: caml-list <caml-list@inria.fr>
Subject: Re: [Caml-list] Memory allocation nano-benchmark.
Date: Thu, 10 Feb 2005 20:56:45 +0100 [thread overview]
Message-ID: <420BBC7D.5070103@t-online.de> (raw)
In-Reply-To: <015f01c50f99$e8a57e60$d54380d9@mshome.net>
Frédéric Gava wrote:
>Peraps test the following code (I do not have test it)
>
>
OK:
memnew.ml
let test tablesize =
let table = Array.create tablesize [| [| |] |] in
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;
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
let _ = test (int_of_string Sys.argv.(1))
The results (on an AMD 2000XP):
chris@gentoo:~/test$ ocamlopt -unsafe -inline 40 memnew.ml
chris@gentoo:~/test$ a.out 300
chris@gentoo:~/test$ time a.out 300
real 0m1.560s
user 0m1.391s
sys 0m0.105s
chris@gentoo:~/test$ ocamlopt -unsafe -inline 40 mem.ml
chris@gentoo:~/test$ time a.out 300
real 0m2.106s
user 0m1.904s
sys 0m0.106s
chris@gentoo:~/test$ gcc -O3 -fomit-frame-pointer mem.c
chris@gentoo:~/test$ time a.out 300
real 0m0.380s
user 0m0.283s
sys 0m0.072s
So, yours is slightly faster, but both are in the same ballpark
and the C version is at least 4X faster.
next prev parent reply other threads:[~2005-02-10 19:56 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-10 15:15 Christian Szegedy
2005-02-10 14:47 ` [Caml-list] " Frédéric Gava
2005-02-10 15:19 ` skaller
2005-02-10 16:36 ` Frédéric Gava
2005-02-10 17:56 ` Frédéric Gava
2005-02-10 19:56 ` Christian Szegedy [this message]
2005-02-10 23:58 ` Frédéric Gava
2005-02-11 9:22 ` Frédéric Gava
2005-02-11 13:04 ` skaller
2005-02-11 13:33 ` skaller
2005-02-11 21:07 ` Oliver Bandel
2005-02-12 0:44 ` skaller
2005-02-15 14:17 ` Frédéric Gava
2005-02-15 19:19 ` Christian Szegedy
2005-02-15 20:51 ` Jon Harrop
2005-02-16 8:19 ` Ville-Pertti Keinonen
2005-02-16 9:54 ` Jon Harrop
2005-02-16 10:56 ` Ville-Pertti Keinonen
2005-02-11 0:55 ` skaller
2005-02-10 14:56 ` Jon Harrop
2005-02-10 15:32 ` Ville-Pertti Keinonen
2005-02-10 14:59 ` John Prevost
2005-02-10 16:50 ` Marwan Burelle
2005-02-10 19:20 ` Christian Szegedy
2005-02-10 19:40 ` Jon Harrop
2005-02-11 11:26 ` Oliver Bandel
2005-02-12 13:42 ` Christian Szegedy
2005-02-11 1:04 ` skaller
2005-02-11 11:28 ` Oliver Bandel
2005-02-12 0:01 ` Guillaume
2005-02-12 0:36 ` skaller
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