From: Thomas Fischbacher <tf@functionality.de>
To: Jon Harrop <jon@ffconsultancy.com>
Cc: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] The Implicit Accumulator: a design pattern using optional arguments
Date: Thu, 28 Jun 2007 13:59:51 +0100 [thread overview]
Message-ID: <4683B0C7.7060201@functionality.de> (raw)
In-Reply-To: <200706281232.01643.jon@ffconsultancy.com>
Jon Harrop wrote:
> I would write:
>
> let rec work sum = function
> | 0 -> sum
> | todo -> work (sum + todo) (todo - 1)
>
> let sum_nums n = work 0 n
>
> because it is shorter, clearer, 65% faster and it is idiomatic ML rather than
> idiomatic Lisp.
You are still evading the issue: you nevertheless pass multiple
arguments to a continuation, rather than consing a return value.
But apart from this: I find it somehow strange that the OCaml compiler
produces noticeable differences in the speed of compiled code when one
does some transcriptions that actually should not matter, such as when
replacing for with Array.iter...
--
best regards,
Thomas Fischbacher
tf@functionality.de
next prev parent reply other threads:[~2007-06-28 12:59 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-27 12:14 Jon Harrop
2007-06-27 13:18 ` [Caml-list] " Quôc Peyrot
2007-06-27 13:53 ` Jon Harrop
2007-06-27 14:18 ` Thomas Fischbacher
2007-06-27 15:09 ` Quôc Peyrot
2007-06-27 15:28 ` Mattias Engdegård
2007-06-27 15:38 ` Robert Fischer
2007-06-27 15:48 ` Mattias Engdegård
2007-06-27 16:01 ` Robert Fischer
2007-06-27 16:01 ` Mattias Engdegård
2007-06-27 18:06 ` Jon Harrop
2007-06-27 18:31 ` Brian Hurt
2007-06-27 19:56 ` skaller
2007-06-27 20:17 ` Jonathan Bryant
2007-06-27 22:57 ` Jon Harrop
2007-06-27 16:53 ` Hash-consing (was Re: [Caml-list] The Implicit Accumulator: a design pattern using optional arguments) Daniel Bünzli
2007-06-30 8:19 ` [Caml-list] The Implicit Accumulator: a design pattern using optional arguments Pierre Etchemaïté
2007-06-27 13:55 ` Thomas Fischbacher
2007-06-27 15:06 ` Quôc Peyrot
2007-06-27 15:53 ` Jon Harrop
2007-06-28 11:01 ` Thomas Fischbacher
2007-06-28 11:32 ` Jon Harrop
2007-06-28 11:42 ` Joel Reymont
2007-06-28 12:08 ` Jon Harrop
2007-06-28 13:10 ` Quôc Peyrot
2007-06-28 13:35 ` Thomas Fischbacher
2007-06-28 12:59 ` Thomas Fischbacher [this message]
2007-06-28 13:05 ` Jon Harrop
2007-06-28 13:33 ` Thomas Fischbacher
2007-06-28 14:43 ` Jon Harrop
2007-06-28 16:01 ` Thomas Fischbacher
2007-06-28 17:53 ` Jon Harrop
2007-06-27 16:39 ` Thomas Fischbacher
2007-06-27 19:26 ` Quôc Peyrot
2007-06-28 11:39 ` Thomas Fischbacher
2007-06-28 14:44 ` Jon Harrop
2007-06-28 16:03 ` Thomas Fischbacher
2007-06-28 17:20 ` Dirk Thierbach
2007-06-28 22:12 ` Thomas Fischbacher
2007-06-29 1:10 ` Jon Harrop
2007-06-29 10:55 ` Thomas Fischbacher
2007-06-29 6:12 ` Dirk Thierbach
2007-06-27 17:16 ` Book about functional design patterns Gabriel Kerneis
2007-06-27 17:48 ` [Caml-list] " Jon Harrop
2007-06-27 19:33 ` Quôc Peyrot
2007-06-27 19:30 ` Quôc Peyrot
2007-06-27 19:48 ` Brian Hurt
2007-06-27 20:04 ` Quôc Peyrot
2007-06-27 20:35 ` Brian Hurt
2007-06-27 20:55 ` Quôc Peyrot
2007-06-27 20:58 ` Pal-Kristian Engstad
2007-06-27 21:18 ` Quôc Peyrot
2007-06-27 21:18 ` Pal-Kristian Engstad
2007-06-27 21:34 ` Quôc Peyrot
2007-06-27 22:13 ` Pal-Kristian Engstad
2007-06-27 15:18 ` [Caml-list] The Implicit Accumulator: a design pattern using optional arguments Jon Harrop
2007-06-27 16:44 ` Thomas Fischbacher
2007-06-27 18:17 ` Jon Harrop
2007-06-28 11:18 ` Thomas Fischbacher
2007-06-29 13:15 ` Bill Wood
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