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| <div class="subTitle">org.apache.drill.test.rowSet.test</div> |
| <h2 title="Class PerformanceTool" class="title">Class PerformanceTool</h2> |
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| <li>org.apache.drill.test.rowSet.test.PerformanceTool</li> |
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| <pre>public class <span class="typeNameLabel">PerformanceTool</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
| <div class="block">Tests the performance of the writers compared to using the value |
| vector mutators directly. In order to achieve apples-to-apples |
| comparison, the tests work directly with individual columns in |
| the writer case; the row writer level is omitted as the row writer |
| simulates the reader logic previously used to write to vectors. |
| <p> |
| Current results: |
| <ul> |
| <li>Required and nullable writers are slightly faster than the |
| corresponding vector mutator methods.</li> |
| <li>Writer is 230% faster than a repeated mutator.</li> |
| </ul> |
| |
| The key reason for the converged performance (now compared to earlier |
| results below) is that both paths now use bounds-checking optimizations. |
| <p> |
| Prior results before the common bounds-check optimizations: |
| <ul> |
| <li>Writer is 42% faster than a required mutator.</li> |
| <li>Writer is 73% faster than a nullable mutator.</li> |
| <li>Writer is 407% faster than a repeated mutator.</li> |
| </ul> |
| Since performance is critical for this component (this is the |
| ultimate "inner loop", please run these tests periodically to |
| ensure that performance does not drop; it is very easy to add |
| a bit of code here or there that greatly impacts performance. |
| <p> |
| This is not a JUnit test. Rather, it is a stand-alone program |
| which must be run explicitly. One handy way is to run it from |
| your IDE. If using Eclipse, monitor the system to wait for Eclipse |
| to finish its background processing before launching.</div> |
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| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/test/rowSet/test/PerformanceTool.ArrayWriterTester.html" title="class in org.apache.drill.test.rowSet.test">PerformanceTool.ArrayWriterTester</a></span></code> </td> |
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| <tr class="rowColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/test/rowSet/test/PerformanceTool.NullableVectorTester.html" title="class in org.apache.drill.test.rowSet.test">PerformanceTool.NullableVectorTester</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/test/rowSet/test/PerformanceTool.NullableWriterTester.html" title="class in org.apache.drill.test.rowSet.test">PerformanceTool.NullableWriterTester</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/test/rowSet/test/PerformanceTool.PerfTester.html" title="class in org.apache.drill.test.rowSet.test">PerformanceTool.PerfTester</a></span></code> </td> |
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| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/test/rowSet/test/PerformanceTool.RepeatedVectorTester.html" title="class in org.apache.drill.test.rowSet.test">PerformanceTool.RepeatedVectorTester</a></span></code> </td> |
| </tr> |
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| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/test/rowSet/test/PerformanceTool.RequiredVectorTester.html" title="class in org.apache.drill.test.rowSet.test">PerformanceTool.RequiredVectorTester</a></span></code> </td> |
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| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/test/rowSet/test/PerformanceTool.RequiredWriterTester.html" title="class in org.apache.drill.test.rowSet.test">PerformanceTool.RequiredWriterTester</a></span></code> </td> |
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| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/test/rowSet/test/PerformanceTool.html#ITERATIONS">ITERATIONS</a></span></code> </td> |
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| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/test/rowSet/test/PerformanceTool.html#ROW_COUNT">ROW_COUNT</a></span></code> </td> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/test/rowSet/test/PerformanceTool.html#PerformanceTool--">PerformanceTool</a></span>()</code> </td> |
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| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/test/rowSet/test/PerformanceTool.html#main-java.lang.String:A-">main</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>[] args)</code> </td> |
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| <h4>ROW_COUNT</h4> |
| <pre>public static final int ROW_COUNT</pre> |
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| <dd><a href="../../../../../../constant-values.html#org.apache.drill.test.rowSet.test.PerformanceTool.ROW_COUNT">Constant Field Values</a></dd> |
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| <h4>ITERATIONS</h4> |
| <pre>public static final int ITERATIONS</pre> |
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| <dd><a href="../../../../../../constant-values.html#org.apache.drill.test.rowSet.test.PerformanceTool.ITERATIONS">Constant Field Values</a></dd> |
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