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Date: Thu, 18 Jul 2013 00:03:59 +0530
From: Sayantan Datta <>
Subject: Re: md5 hash comparisons


On Wed, Jul 17, 2013 at 10:17 PM, Solar Designer <> wrote:

> Please take a look at myrice's PG-test branch and his use of bitmaps.

I saw the bitmap code, fundamental idea seems to be translation of a bit
based on hash value. Instead of searching exact values, we do a lookup for
a bit value in the bitmap. It seems to reduce memory use a lot which is
really great.


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