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Re: What O/S or hardware feature would be useful for databases?

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To: "Ron Johnson" <ron.l.johnson@xxxxxxx>
Subject: Re: What O/S or hardware feature would be useful for databases?
From: "Alexander Staubo" <alex@xxxxxxxxxxxxxxx>
Date: Sun, 17 Jun 2007 00:05:29 +0200
Cc: pgsql-general@xxxxxxxxxxxxxx
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On 6/16/07, Ron Johnson <ron.l.johnson@xxxxxxx> wrote:

> Hardware acceleration for quickly counting the number of
> set/unset/matching bits?

x86 doesn't already do that?


I don't think so. The fastest way, I believe, is to use precomputed
lookup tables. Same for finding the least/most significant set/unset
bit, and other operations useful for dealing with bit vectors.

Alexander.

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