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<p class=MsoNormal><span style='color:#1F497D'>I realized I screwed up my lzop
test.&nbsp; Here is an update:<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>------------------<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>&nbsp;&nbsp; LZO (lzop) compression level
1<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>78M&nbsp;&nbsp; 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'>&nbsp;&nbsp; LZO (lzop) compression level
5<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>77M&nbsp;&nbsp; 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'>&nbsp;&nbsp; LZO (lzop) compression level
9<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'>71M&nbsp;&nbsp; 1m21.792s<o:p></o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='color:#1F497D'><o:p>&nbsp;</o:p></span></p>

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<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>

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<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>I decided to benchmark some compression algorithms on our
actual data.&nbsp; Results are attached.<o:p></o:p></p>

<p class=MsoNormal>&nbsp;<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'>&middot;<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</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'>&middot;<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]>7-zip (p7zip) produces the best compression
ratio.&nbsp; (Overall, it's the most impressive.)&nbsp; 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'>&middot;<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]>gzip --fast is the most widely available.&nbsp;
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.&nbsp; 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'>&middot;<span style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]>bzip2 is soundly destroyed by 7-zip, if only
7-zip is made available as an in-line filter.&nbsp; 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>&nbsp;</o:p></p>

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