Changes between Initial Version and Version 1 of CompressionSpeedTest


Ignore:
Timestamp:
Nov 4, 2009, 6:07:47 PM (15 years ago)
Author:
Rick van der Zwet
Comment:

--

Legend:

Unmodified
Added
Removed
Modified
  • CompressionSpeedTest

    v1 v1  
     1bzip2, gzip, or zip. Which will win the race?
     2
     3= File characteristic =
     4quick# ls -alh embedded.img
     5> -rw-r--r--  1 root  wheel   1.0G Nov  4 16:55 embedded.img
     6
     7quick# mdconfig -a -t vnode -f embedded.img
     8> md0
     9quick# mount /dev/md0
     10> md0%    md0s1%  md0s1a%
     11quick# mount /dev/md0s1a /mnt/
     12quick# df -h | grep mnt
     13> /dev/md0s1a    961M    189M    695M    21%    /mnt
     14
     15= Experiments =
     16
     17quick# time zip embedded.img.zip embedded.img
     18>  adding: embedded.img
     19> 31.350u 0.706s 0:32.23 99.4%  223+1310k 4+604io 0pf+0w
     20quick# time gzip embedded.img
     21> 36.136u 0.781s 0:37.13 99.4%  42+1491k 2+604io 0pf+0w
     22quick# time bzip2 embedded.img
     23> 91.701u 0.961s 1:32.83 99.8%  37+1496k 1+533io 0pf+0w
     24
     25quick# ls -lah embedded.img.*
     26> -rw-r--r--  1 root  wheel    67M Nov  4 16:55 embedded.img.bz2
     27> -rw-r--r--  1 root  wheel    75M Nov  4 16:55 embedded.img.gz
     28> -rw-r--r--  1 root  wheel    76M Nov  4 16:58 embedded.img.zip
     29
     30quick# time unzip embedded.img.zip
     31> Archive:  embedded.img.zip
     32>  inflating: embedded.img           
     33> 8.175u 1.237s 0:18.30 51.3%   145+1354k 0+8000io 0pf+0w
     34quick# time gunzip embedded.img.gz
     35> 6.076u 1.380s 0:17.98 41.4%   42+1500k 0+8000io 0pf+0w
     36quick# time bunzip2 embedded.img.bz2
     37> 20.996u 1.935s 0:31.99 71.6%  37+1487k 0+8000io 0pf+0w
     38
     39
     40= Results =
     41Use bzip2 for best compression, but trade off is time (roughly 2x more), still do-able though. Also do mind that zip is the only one support by Windows(r) by default. Others require programs like 7-Zip to be installed. Secondly zip is not installed on the system by default, use:
     42quick# pkg_add -r zip unzip