From: Edgar Friendly <thelema314@gmail.com>
To: caml-list@inria.fr
Subject: Re: [Caml-list] is there a more concise way to write this?
Date: Fri, 20 Jan 2012 08:29:09 -0500 [thread overview]
Message-ID: <4F196C25.7070402@gmail.com> (raw)
In-Reply-To: <E51C5B015DBD1348A1D85763337FB6D9C264BA49@Remus.metastack.local>
On 01/20/2012 03:37 AM, David Allsopp wrote:
> Actually, it's possible that with more cases it might be faster -
> it's
> eliminating the allocation (at some point) of all the tuples needed for
> the match case,
Doesn't the ocaml compiler not allocate the unnecessary tuples?
https://ocaml.janestreet.com/?q=node/90
> it potentially eliminates a lot of linear comparisons to
> find the correct match case (I don't think that the compiler would be
> able to optimise that to a hash-based or index-based lookup)
Isn't the compiler's compilation strategy for match cases able to build
an optimized tree of comparisons in cases like this? I agree there's no
easy index or hash strategy for this, but I'd expect it to turn this
pattern matching into the equivalent of:
if a then if b then [a;b] else [a]
else if b then [b] else []
E.
next prev parent reply other threads:[~2012-01-20 13:29 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-20 6:38 Martin DeMello
2012-01-20 6:46 ` Valentin ROBERT
2012-01-20 6:58 ` Martin DeMello
2012-01-20 8:37 ` David Allsopp
2012-01-20 13:29 ` Edgar Friendly [this message]
2012-01-20 13:50 ` Fabrice Le Fessant
2012-01-20 13:58 ` oliver
2012-01-20 14:05 ` Edgar Friendly
2012-01-20 14:12 ` David Allsopp
2012-01-20 14:23 ` Fabrice Le Fessant
2012-01-20 14:23 ` Edgar Friendly
2012-01-20 8:37 ` Sebastien Ferre
2012-01-20 9:11 ` Jerome Vouillon
2012-01-20 9:34 ` Fabrice Le Fessant
2012-01-20 10:27 ` Arnaud Spiwack
2012-01-20 8:52 ` Lin
2012-01-20 9:08 ` Valentin ROBERT
2012-01-20 9:19 ` Lin
2012-01-20 10:21 ` Martin DeMello
2012-01-20 9:38 ` oliver
2012-01-20 13:59 ` Edgar Friendly
2012-01-20 14:42 ` oliver
2012-01-20 15:31 ` Fabrice Le Fessant
2012-01-20 21:04 ` oliver
2012-01-20 21:09 ` oliver
2012-01-20 20:40 ` oliver
2012-01-20 21:07 ` Martin DeMello
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