From: ············@games.ultranet.com
Subject: log*, boole, dpb, and bit* functions
Date: Mon, 16 Mar 1998 00:00:00 +0000
Message-ID: <350daf15.585936922@news.ultranet.com>

What's the philosophy on when to use integers for bit-set operations, and when
to use bit vectors?

I need to manipulate very large bit vectors.  I want the manipulations to be
efficient.  Bit vectors seem like the obvious choice.  However there are two
things about integers and the log* functions which I also find nice:

1) ldb and dpb seem like they might be more efficient for manipulating ranges
    of bits.  

2) The ability to perform logical operations on bit sets of different lengths
     only works with the log*/boole functions.  

Also, if there's a function to turn a bit vector into an integer, I haven't
found it, but I'm referring to my copy of CLTL2 and not the standard.

Looking for tips from the masters, especially if you've used the Franz
CL products (ACLPC and CL4.3.* or CL5.0 on NT)

Thanks,
Dave Tenny

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