📄 benchmark.htm
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<title>Benchmarks</title>
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<p class="headerfont">Benchmark</p>
<p class="textfont">I've done some benchmarking tests with the other free compression
library <a href="http://www.icsharpcode.net/OpenSource/SharpZipLib/Default.aspx">#ZipLib</a>
(are there other non-commercial compression libs for .NET ?). #ZipLib is a pure
C# library and has a lot more features than LZO.Net (i. e. ZipFile-Handling)
but can also be used for simple byte-stream compression.</p>
<p class="textfont">Because the first priority of LZO.Net is speed I used the
#ZipLib-Deflaters with "Best-Speed" level. For the most accurate results
the durations of the compression/decompression steps were measured with Windows
performance counters. Memory consumption wasn't measured.</p>
<p class="textfont">You can see that the compression ratio of #ZipLib is always
a little bit better. But LZO.Net is <strong>much faster</strong> in both compression
and decompression. </p>
<p class="textfont"> </p>
<table width="75%" border="1" class="textfont">
<tr>
<td colspan="4"><strong>Test-System: IBM-Thinkpad A21m (800 Mhz), 512MB, W2K
(SP4)</strong></td>
</tr>
<tr>
<td colspan="4"> </td>
</tr>
<tr>
<td colspan="2"> </td>
<td width="26%"><strong>LZO.Net</strong></td>
<td width="26%"><strong>#ZipLib</strong></td>
</tr>
<tr>
<td colspan="2"><strong>XML-File (Size: 9626 KBytes)</strong></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td width="5%" rowspan="4"> </td>
<td width="43%">Compression ratio</td>
<td>10,79 %</td>
<td>8,22 %</td>
</tr>
<tr>
<td>Compression speed</td>
<td>17 ms</td>
<td>76 ms</td>
</tr>
<tr>
<td>Decompression speed</td>
<td>8 ms</td>
<td>34 ms</td>
</tr>
<tr>
<td colspan="3"> </td>
</tr>
<tr>
<td height="22" colspan="2"><strong>DirectX-Online-Help (11485 KBytes)</strong></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td rowspan="4"> </td>
<td width="43%">Compression ratio</td>
<td>96,5 %</td>
<td>95,87 %</td>
</tr>
<tr>
<td>Compression speed</td>
<td>105 ms</td>
<td>377 ms</td>
</tr>
<tr>
<td>Decompression speed</td>
<td>13 ms</td>
<td>36 ms</td>
</tr>
<tr>
<td colspan="3"> </td>
</tr>
<tr>
<td colspan="2"><strong>PDF (1327 KBytes)</strong></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td rowspan="4"> </td>
<td>Compression ratio</td>
<td>66,54 %</td>
<td>65,1 %</td>
</tr>
<tr>
<td>Compression speed</td>
<td>9 ms</td>
<td>40 ms</td>
</tr>
<tr>
<td>Decompression speed</td>
<td>1 ms</td>
<td>14 ms</td>
</tr>
<tr>
<td colspan="3"> </td>
</tr>
<tr>
<td colspan="2"><strong>DB2-Transaction-Logfile (10008 KBytes)</strong></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td rowspan="4"> </td>
<td>Compression ratio</td>
<td>26,81 %</td>
<td>22,23 %</td>
</tr>
<tr>
<td>Compression speed</td>
<td>27 ms</td>
<td>154 ms</td>
</tr>
<tr>
<td>Decompression speed</td>
<td>13 ms</td>
<td>76 ms</td>
</tr>
<tr>
<td colspan="3"> </td>
</tr>
<tr>
<td colspan="2"><strong>Lotus-Notes-DB (12544 KBytes)</strong></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td rowspan="3"> </td>
<td>Compression ratio</td>
<td>30,73 %</td>
<td>27,36 %</td>
</tr>
<tr>
<td>Compression speed</td>
<td>41 ms</td>
<td>209 ms</td>
</tr>
<tr>
<td>Decompression speed</td>
<td>15 ms</td>
<td>91 ms</td>
</tr>
</table>
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