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Message-ID: <2645466.DhVCujJyyx@PointedEars.de>
From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Reply-To: Thomas 'PointedEars' Lahn <cljs@PointedEars.de>
Organization: PointedEars Software (PES)
Date: Fri, 13 Sep 2013 05:15:05 +0200
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Subject: Re: Strawmans prime sieve/filter
Newsgroups: comp.lang.javascript
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Stefan Weiss wrote:

> On 2013-09-13 02:27, Thomas 'PointedEars' Lahn wrote:
>> Dr J R Stockton wrote:
>>> IIRC, of the 2^64 bit patterns in an 8 byte Double, two represent the
>>> infinities, and about 2^53 represent NaN, which ECMAScript cannot
>>> "resolve".
> 
> (If we're going into that much detail, there's also -0, which is a
> separate value in IEEE floats.)

Yes, but that is irrelevant.
 
>> The 0-bits of the IEEE-754 value must *also* be stored in memory.
> 
> Oh, that's easy to solve. The 0-bits are empty anyway, so we can just
> leave them out and concentrate on the more important 1s. Then we just
> count how many 1s there are left and store that total, thus drastically
> reducing memory usage. To decompress, just insert the empty bits back
> in. (The boring question of where to insert them is left as an exercise
> to the reader.) I call this compression technique "Bogocomp"; patent
> pending.

Utter nonsense.  You have no clue what you are talking about.
 
-- 
PointedEars

Twitter: @PointedEars2
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