From: Jonas Jensen <jj@issuu.com>
To: Gregory Malecha <gmalecha@gmail.com>
Cc: caml users <caml-list@inria.fr>
Subject: Re: [Caml-list] Question about Optimization
Date: Thu, 21 Apr 2016 11:32:01 +0200 [thread overview]
Message-ID: <CAExvvWxq=7ZYoU2iejz15v3EMnnyeHyCvXOAA7==FJ-+KYA47Q@mail.gmail.com> (raw)
In-Reply-To: <CAGraiHKV1npLz5iER0CNgJ86ufOAFTmfr_c+_tNOFiC3w0qL4g@mail.gmail.com>
On 21 April 2016 at 09:13, Gregory Malecha <gmalecha@gmail.com> wrote:
>
> I'm wondering if there is any work (and interest) on supporting user-defined optimizations similar to GHC's rewrite rules in the Ocaml compiler. For example, a standard example would be specifying map fusion:
>
> map f (map g ls) = map (fun x -> f (g x)) ls
A "boring" and practical answer is that you get this optimization by
writing your long chain of map, filter, bind, etc. using Batteries'
Enum (http://ocaml-batteries-team.github.io/batteries-included/hdoc2/BatEnum.html)
or the stand-alone Gen package
(http://cedeela.fr/~simon/software/gen/Gen.S.html). It looks
superficially like list map, but the order of execution will be like
after a fusion, which should improve cache locality and avoid
allocations of intermediate lists.
Cheers,
Jonas
next prev parent reply other threads:[~2016-04-21 9:32 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-21 7:13 Gregory Malecha
2016-04-21 9:32 ` Jonas Jensen [this message]
2016-04-21 11:45 ` Yaron Minsky
2016-04-21 15:45 ` Gregory Malecha
2016-04-21 16:02 ` Gabriel Scherer
2016-04-21 16:05 ` Daniel Bünzli
2016-04-21 16:35 ` Ben Millwood
2016-04-22 16:09 ` Gregory Malecha
2016-11-08 12:07 ` [Caml-list] The fastest stream library [Was: Question about Optimization] Oleg
2016-11-08 12:05 ` Gregory Malecha
2016-11-08 12:15 ` Gabriel Scherer
2016-11-08 12:47 ` [Caml-list] The fastest stream library [Was: Question about Oleg
2016-11-08 15:45 ` Gabriel Scherer
2016-11-12 13:01 ` Oleg
2016-11-12 16:21 ` Simon Cruanes
2016-11-12 16:35 ` Gabriel Scherer
-- strict thread matches above, loose matches on Subject: below --
2008-11-02 2:52 Question about optimization Michał C
2008-11-02 12:23 ` [Caml-list] " Peng Zang
2008-11-02 13:02 ` Jon Harrop
2008-11-02 15:52 ` Jon Harrop
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