Linux/Compression tools: Difference between revisions

Revision as of 13:05, 18 November 2012

benchmark

Compressing 6144MB kvm image

Command	Arguments	compressed size [MB]	time [s]
pigz	--best	1526	259.65
pigz	--fast	1667	28.06
cat	> target	6144	60.80
copy		6144	59.36
7z	a -t7z -mx1 -si	1333	359.66
7z	a -t7z -mx9 -si	993	1360.15
7z	a -m0=lzma2 -si	1137	551.40
lzma

benchmark script

#!/bin/bash
COMPRESSCMD="pigz -9"
DESC="pigz-best"

START=$(date +%s.%N)
cat image.img | $COMPRESSCMD > /backup/$DESC.img.gz
END=$(date +%s.%N)
DIFF=$(echo "$END - $START" | bc)
echo "$DIFF" > /backup/$DESC.log

@@ Line 43: / Line 43: @@
 |-
 | 7z
-| a -m0=lzma2 -se
+| a -m0=lzma2 -si
 | 1137
 | 551.40