Compression formats Benchmark

for a in bzip2 lzma gzip;do echo -n>$a;for b in $(seq 0 256);do dd if=/dev/zero of=$b.zero bs=$b count=1;c=$(date +%s%N);$a $b.zero;d=$(date +%s%N);total=$(echo $d-$c|bc);echo $total>>$a;rm $b.zero *.bz2 *.lzma *.gz;done;done

See: http://imgur.com/JgjK2.png for example. Do some serious benchmarking from the commandline. This will write to a file with the time it took to compress n bytes to the file (increasing by 1). Run: gnuplot -persist <(echo "plot 'lzma' with lines, 'gzip' with lines, 'bzip2' with lines") To see it in graph form.

By: matthewbauer

2009-10-20 01:00:51

bzip2 date dd echo seq graph benchmark plot compression format

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I wouldn't say clumps of zeroes make for a very representative test sample but otherwise pretty good.

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True. Could we just substitue /dev/zero with /dev/random?

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