From: "Philippe Lelédy" <phl@leledy.org>
To: Caml-list@yquem.inria.fr
Subject: Re: [Caml-list] Ocaml sums the harmonic series -- four ways, four benchmarks: floating point performance
Date: Sun, 16 Jan 2005 10:57:26 +0100 [thread overview]
Message-ID: <41EA3A86.2070408@leledy.org> (raw)
Xavier Leroy wrote:
> done;
> !sum +. 0.0;;
>
> The + 0.0 at the end is ugly but convinces ocamlopt that !sum is best
> kept unboxed during the loop.
Here are my times which show little difference w/ or w/o this hack
On 1.8 GHz PowerPC G5 (MacOS X 10.3.7, Objective Caml version 3.08.0)
./sumH4 1000000000 17.65s user 0.16s system 91% cpu 19.461 total
./sumH5 1000000000 16.17s user 0.11s system 91% cpu 17.702 total
On Intel(R) Pentium(R) 4 CPU 3.00GHz (Debian GNU/Linux, Objective Caml version 3.08.2)
./sumH4 1000000000 15,57s user 0,00s system 99% cpu 15,646 total
./sumH5 1000000000 15,45s user 0,00s system 99% cpu 15,480 total
Ph. L.
next reply other threads:[~2005-01-16 9:57 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-16 9:57 Philippe Lelédy [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-01-13 15:53 Will M. Farr
2005-01-13 17:29 ` [Caml-list] " John Prevost
2005-01-13 19:01 ` Will M. Farr
2005-01-13 20:24 ` John Prevost
2005-01-13 20:50 ` Erik de Castro Lopo
2005-01-13 21:32 ` Erik de Castro Lopo
2005-01-15 11:55 ` Xavier Leroy
2005-01-15 15:49 ` Michal Moskal
2005-01-15 17:13 ` Yaron Minsky
2005-01-23 2:27 ` Oliver Bandel
2005-01-23 6:07 ` Will M. Farr
2005-01-23 15:18 ` Oliver Bandel
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