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

From: "Alexander Staubo" <alex(at)purefiction(dot)net>
To: "Ron Johnson" <ron(dot)l(dot)johnson(at)cox(dot)net>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: What O/S or hardware feature would be useful for databases?
Date: 2007-06-16 22:05:29
Message-ID: 88daf38c0706161505h214a777bg59bd988daf060419@mail.gmail.com
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On 6/16/07, Ron Johnson <ron(dot)l(dot)johnson(at)cox(dot)net> 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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