<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 12 (filtered medium)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:.5in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
span.EmailStyle18
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:107893568;
mso-list-type:hybrid;
mso-list-template-ids:63231302 67698689 67698691 67698693 67698689 67698691 67698693 67698689 67698691 67698693;}
@list l0:level1
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:.25in;
text-indent:-.25in;
font-family:Symbol;}
@list l0:level2
{mso-level-tab-stop:1.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level3
{mso-level-tab-stop:1.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level4
{mso-level-tab-stop:2.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level5
{mso-level-tab-stop:2.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level6
{mso-level-tab-stop:3.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level7
{mso-level-tab-stop:3.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level8
{mso-level-tab-stop:4.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level9
{mso-level-tab-stop:4.5in;
mso-level-number-position:left;
text-indent:-.25in;}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang=EN-US link=blue vlink=purple>
<div class=WordSection1>
<p class=MsoNormal><span style='color:#1F497D'>I realized I screwed up my lzop
test. Here is an update:<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>------------------<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> LZO (lzop) compression level
1<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>78M 0m1.820s<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>------------------<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> LZO (lzop) compression level
5<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>77M 0m1.913s<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>------------------<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> LZO (lzop) compression level
9<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>71M 1m21.792s<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
bblisa-bounces@bblisa.org [mailto:bblisa-bounces@bblisa.org] <b>On Behalf Of </b>Edward
Ned Harvey<br>
<b>Sent:</b> Tuesday, June 29, 2010 9:16 AM<br>
<b>To:</b> bblisa@bblisa.org<br>
<b>Subject:</b> [BBLISA] Compression Algorithms<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I decided to benchmark some compression algorithms on our
actual data. Results are attached.<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal>Summary:<o:p></o:p></p>
<p class=MsoListParagraph style='margin-left:.25in;text-indent:-.25in;
mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol'><span
style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]>LZO is the fastest.<o:p></o:p></p>
<p class=MsoListParagraph style='margin-left:.25in;text-indent:-.25in;
mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol'><span
style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]>7-zip (p7zip) produces the best compression
ratio. (Overall, it's the most impressive.) Doesn't seem possible
to use it as an in-line filter.<o:p></o:p></p>
<p class=MsoListParagraph style='margin-left:.25in;text-indent:-.25in;
mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol'><span
style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]>gzip --fast is the most widely available.
Its speed is same order of magnitude with LZO, and its compression is same
order of magnitude as 7-zip, but it's unquestionably beat by those others, in
their natural habitat. So for general purpose, gzip --fast is the most
likely to be used in general.<o:p></o:p></p>
<p class=MsoListParagraph style='margin-left:.25in;text-indent:-.25in;
mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol'><span
style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]>bzip2 is soundly destroyed by 7-zip, if only
7-zip is made available as an in-line filter. Presently, in-line
filtering is the only reason to ever use bzip2 instead of 7-zip.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
</div>
</div>
</body>
</html>