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comparing two binary numbers

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From:
Johnson Lau
Date:
May 10, 2008 22:09
Subject:
comparing two binary numbers
Dear all,

I need to compare two binary numbers and need perl to return the
number of matching bits.

For example:

$aaa = "10111100";
$bbb = "00101100";

In this case, the number of matching bits is 6.

I know I could split the strings and compare the bits one by one.
However, is there any faster functions for this? I need to compare
millions of such strings with 1000 bits for each.

Thanks a lot!!

Johnson Lau
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