This is the Linux app named CountBitsSet whose latest release can be downloaded as countbitsset-code.tar.bz2. It can be run online in the free hosting provider OnWorks for workstations.
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SCREENSHOTS
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CountBitsSet
DESCRIPTION
I was curious how much better the Algorithms, pointed out by BitTwiddling Hacks, perform than a simple Lookup Table approach...
Now I think, perhaps my little investigation is interesting for others too...
PS: the parallel counting Algo is about 35% faster on average on my computers than the simpel LUT solution. Also this shows nicely how different a human brain compatible solution is to a binary machine optimal solution :-)
PS: see result.txt in Code to see various runs with different compilers and compiler switches
Features
- C++
- CountBitsSet, PopulationCount.Integer Hamming weight
- simple Benchmark
Audience
Education, Developers
User interface
Console/Terminal, Command-line
Programming Language
C++
This is an application that can also be fetched from https://sourceforge.net/projects/countbitsset/. It has been hosted in OnWorks in order to be run online in an easiest way from one of our free Operative Systems.
