From: Jacques Garrigue <garrigue@math.nagoya-u.ac.jp>
To: kybic@fel.cvut.cz
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] Re: ATS versus Ocaml
Date: Sat, 07 Nov 2009 10:56:20 +0900 (JST) [thread overview]
Message-ID: <20091107.105620.219613657.garrigue@math.nagoya-u.ac.jp> (raw)
In-Reply-To: <87ljijd5os.fsf@fel.cvut.cz>
From: Jan Kybic <kybic@fel.cvut.cz>
>>Do you know if ATS is performing array bound checking? The OCaml code is
>>nearly 2X faster with -unsafe than without.
>
> Yes, I think the ATS code does perform bound checking. There is
> probably a way to avoid it but I do not know how to do it yet.
The whole point of ATS is to use a richer type system to avoid many
runtime checks. Static check of bounds is supposedly one of them.
If your program is written with the clever .<n>. annotations (I don't
remember the exact syntax), then there should be no bound checks at
runtime.
Not that this is not equivalent to ocaml's -unsafe: the program is
still safe, since the checks were done at compile time.
Jacques Garrigue
next prev parent reply other threads:[~2009-11-07 1:56 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-04 14:01 AST " Jan Kybic
2009-11-04 14:41 ` [Caml-list] " Kevin Cheung
2009-11-04 15:42 ` Jan Kybic
2009-11-04 20:25 ` Jon Harrop
2009-11-04 22:21 ` Jan Kybic
2009-11-04 23:15 ` Jon Harrop
2009-11-06 11:48 ` [Caml-list] ATS " Jan Kybic
2009-11-06 12:11 ` Sylvain Le Gall
2009-11-06 15:38 ` [Caml-list] " Jan Kybic
2009-11-07 1:56 ` Jacques Garrigue [this message]
2009-11-07 19:00 ` Jon Harrop
2009-11-06 12:22 ` [Caml-list] " Mauricio Fernandez
2009-11-04 15:37 ` [Caml-list] AST " malc
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20091107.105620.219613657.garrigue@math.nagoya-u.ac.jp \
--to=garrigue@math.nagoya-u.ac.jp \
--cc=caml-list@inria.fr \
--cc=kybic@fel.cvut.cz \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).