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From: John Prevost <prevost@maya.com>
To: Xavier Leroy <Xavier.Leroy@inria.fr>
Cc: Edwin Young <edwiny@entropic.co.uk>,
	"'caml-list@inria.fr'" <caml-list@inria.fr>
Subject: Re: 32 bit integers
Date: 21 Oct 1999 20:00:12 -0400	[thread overview]
Message-ID: <m33dv4tgc3.fsf@isil.maya.com> (raw)
In-Reply-To: Xavier Leroy's message of "Thu, 21 Oct 1999 16:24:00 +0200"

Xavier Leroy <Xavier.Leroy@inria.fr> writes:

> See for instance J.-C. Filliatre's "Int32" library,
> http://www.lri.fr/~filliatr/ftp/ocaml/int32/
> (although I object to the name of that library -- on an Alpha, it
> implements 64-bit integers...)

I found this implementation to be terribly slow (even slower than the
bignum stuff in many cases.)  Any idea why this is?  Is it just
because of the extra dereference, or is it because the compiler uses
better code for "primitive" type operations like int addition than it
does for other types?  (This second was my guess.)  Is there any way
to make this kind of extension work better?

John.




  parent reply	other threads:[~1999-10-25 15:31 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
1999-10-18 14:47 Edwin Young
1999-10-21 14:24 ` Xavier Leroy
1999-10-21 19:17   ` Scott Alexander
1999-10-22  0:00   ` John Prevost [this message]
1999-10-22  9:42     ` Xavier Leroy
1999-10-21 18:13 Manuel Fahndrich
1999-10-29 21:28 Juergen Pfitzenmaier

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