File:Benchmark common compression formats - Compressing speed.svg

#!/bin/bash

rm -f *.compress *.decompress *.factor
for testnum in $(seq 0 500 10000); do
	lorem -p $testnum > data
    for archiver in bzip2 lzma xz gzip lzip lzop lrzip; do
		case $archiver in 
			bzip2)
				suffix=bz2;;
			lzma) 
				suffix=lzma;;
			xz)
				suffix=xz;;
			gzip)
				suffix=gz;;
			lzip)
				suffix=lz;;
			lzop)
				suffix=lzo;;
			lrzip)
				suffix=lrz;;
		esac

		cp data current-$testnum
		s1=$(stat -c %s current-$testnum)

        c=$(date +%s%N)
        $archiver current-$testnum
        d=$(date +%s%N)
        total=$(echo $d-$c | bc)
        echo "$testnum $total" >> $archiver.compress

		s2=$(stat -c %s current-$testnum.$suffix)
		factor=$(echo "scale=10;$s1/$s2" | bc)
        echo "$testnum $factor" >> $archiver.factor

		rm -f current-$testnum

        c=$(date +%s%N)
		$archiver -d current-$testnum.$suffix
        d=$(date +%s%N)
        total=$(echo $d-$c | bc)
        echo "$testnum $total" >> $archiver.decompress

		rm -f current*
		rm -f *.bz2 *.lzma *.gz *.xz *.lzo *.lz *.lrz
    done

done
gnuplot <(echo "set terminal svg;set ylabel 'Time (nanoseconds)' textcolor lt 1; set xlabel 'Size (Number of paragraphs of random lorem ipsum text)' textcolor lt 2;plot 'lzma.compress' title 'lzma' with lines, 'xz.compress' title 'xz' with lines, 'gzip.compress' title 'gzip' with lines, 'lzip.compress' title 'lzip' with lines, 'lzop.compress' title 'lzop' with lines, 'lrzip.compress' title 'lrzip' with lines, 'bzip2.compress' title 'bzip2' with lines") > compress.svg

gnuplot <(echo "set terminal svg;set ylabel 'Time (nanoseconds)' textcolor lt 1; set xlabel 'Size (Number of paragraphs of random lorem ipsum text)' textcolor lt 2;plot 'lzma.decompress' title 'lzma' with lines, 'xz.decompress' title 'xz' with lines, 'gzip.decompress' title 'gzip' with lines, 'lzip.decompress' title 'lzip' with lines, 'lzop.decompress' title 'lzop' with lines, 'lrzip.decompress' title 'lrzip' with lines, 'bzip2.decompress' title 'bzip2' with lines") > decompress.svg

gnuplot <(echo "set terminal svg;set ylabel 'Compression factor' textcolor lt 1; set xlabel 'Size (Number of paragraphs of random lorem ipsum text)' textcolor lt 2;plot 'lzma.factor' title 'lzma' with lines, 'xz.factor' title 'xz' with lines, 'gzip.factor' title 'gzip' with lines, 'lzip.factor' title 'lzip' with lines, 'lzop.factor' title 'lzop' with lines, 'lrzip.factor' title 'lrzip' with lines, 'bzip2.factor' title 'bzip2' with lines") > factor.svg