From: "Török Edwin" <edwin+ml-ocaml@etorok.net>
To: caml-list@inria.fr
Subject: Re: [Caml-list] ackermann microbenchmark strange results
Date: Wed, 24 Apr 2013 20:31:53 +0300 [thread overview]
Message-ID: <51781709.30604@etorok.net> (raw)
In-Reply-To: <20130424172654.GA5722@shuttle.happyleptic.org>
On 04/24/2013 08:26 PM, rixed@happyleptic.org wrote:
> -[ Wed, Apr 24, 2013 at 06:08:00PM +0200, Alain Frisch ]----
>> +1
>>
>> I've already seen 20% speedup obtained by adding some dead code (in
>> an OCaml program, but this is irrelevant).
>
> Remember me of a paper I read some years ago that was measuring the effect of
> the various optimisation levels of gcc against the effect of addresses choices
> (randomised using environment strings of various lengths!), and which
> conclusion was that the effect of -O3 compared to -O2 was less than the effect
> of "choosing" a good environment string :-)
>
> Couldn't find it again using Google ; maybe someone remember this paper?
>
>
http://plasma.cs.umass.edu/emery/stabilizer
--Edwin
next prev parent reply other threads:[~2013-04-24 17:31 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-24 10:35 ygrek
2013-04-24 15:57 ` John Carr
2013-04-24 16:08 ` Alain Frisch
2013-04-24 16:57 ` Anthony Tavener
2013-04-24 17:26 ` rixed
2013-04-24 17:31 ` Török Edwin [this message]
2013-04-24 17:35 ` Matteo Frigo
2013-04-26 3:31 ` ygrek
2013-04-24 17:40 ` Xavier Leroy
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