From: Alex Baretta <alex@baretta.com>
To: Jan Kybic <kybic@fel.cvut.cz>
Cc: caml-list@pauillac.inria.fr
Subject: Re: [Caml-list] Re: Q: automatic forgetting cache, module Weak, Gc control
Date: Thu, 01 Jul 2004 20:14:06 +0200 [thread overview]
Message-ID: <40E4546E.70005@baretta.com> (raw)
In-Reply-To: <m2n02j3daj.fsf_-_@fel.cvut.cz>
Jan Kybic wrote:
> I am also thinking about other strategies taking into account the
> sizes of the produced results. In this case the global structure would
> be an ordered set.
>
> The disadvantage of putting the values into two structures is the
> memory overhead. Maybe I should avoid using Weak hashtables
> alltogether and store the values in a set of normal hashtables,
> dropping some of them, if necessary... It is difficult to get the
> memory/speed tradeoff right.
You can memoize your results in a generic manner through the use of maps
which use result hashes as keys. Two results hashing down to the same
value will not be stored in the same map. The number of significant bits
used by the hash function determines the size of the map.
Alex
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next prev parent reply other threads:[~2004-07-01 18:13 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-30 11:05 [Caml-list] " Jan Kybic
2004-07-01 8:43 ` Jacques GARRIGUE
2004-07-01 13:59 ` skaller
2004-07-01 16:25 ` [Caml-list] " Jan Kybic
2004-07-01 18:14 ` Alex Baretta [this message]
2004-07-02 8:53 ` Hendrik Tews
2004-07-02 9:40 ` Jan Kybic
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