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class="sidebar-link">Disassembling and Decompiling</a></li><li><a href="/java/jmx.html" class="sidebar-link">JMX</a></li><li><a href="/java/java-virtual-machine-jvm.html" class="sidebar-link">Java Virtual Machine (JVM)</a></li><li><a href="/java/xjc.html" class="sidebar-link">XJC</a></li><li><a href="/java/jvm-flags.html" class="sidebar-link">JVM Flags</a></li><li><a href="/java/jvm-tool-interface.html" class="sidebar-link">JVM Tool Interface</a></li><li><a href="/java/java-memory-management.html" class="sidebar-link">Java Memory Management</a></li><li><a href="/java/java-performance-tuning.html" class="sidebar-link">Java Performance Tuning</a></li><li><a href="/java/benchmarks.html" aria-current="page" class="active sidebar-link">Benchmarks</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a href="/java/benchmarks.html#simple-jmh-example" class="sidebar-link">Simple JMH example</a></li></ul></li><li><a href="/java/fileupload-to-aws.html" class="sidebar-link">FileUpload to AWS</a></li><li><a href="/java/appdynamics-and-tibco-businessworks-instrumentation-for-easy-integration.html" class="sidebar-link">AppDynamics and TIBCO BusinessWorks Instrumentation for Easy Integration</a></li><li><a href="/java/the-classpath.html" class="sidebar-link">The Classpath</a></li><li><a href="/java/resources-on-classpath.html" class="sidebar-link">Resources (on classpath)</a></li><li><a href="/java/contributors.html" class="sidebar-link">The Contributors</a></li></ul></section></li></ul> </aside> <main class="page"> <div class="theme-default-content content__default"><h1 id="benchmarks"><a href="#benchmarks" class="header-anchor">#</a> Benchmarks</h1> <p>Writing performance benchmarks in java is not as simple as getting <code>System.currentTimeMillis()</code> in the beginning and in the end and calculating the difference. To write valid performance benchmarks, one should use proper tools.</p> <h2 id="simple-jmh-example"><a href="#simple-jmh-example" class="header-anchor">#</a> Simple JMH example</h2> <p>One of the tools for writing proper benchmark tests is <a href="http://openjdk.java.net/projects/code-tools/jmh/" target="_blank" rel="noopener noreferrer">JMH<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a>. Let's say we want to compare performance of searching an element in <code>HashSet</code> vs <code>TreeSet</code>.</p> <p>The easiest way to get JHM into your project - is to use maven and <a href="https://maven.apache.org/plugins/maven-shade-plugin/" target="_blank" rel="noopener noreferrer">shade<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a> plugin. Also you can see <code>pom.xml</code> from <a href="http://hg.openjdk.java.net/code-tools/jmh/file/tip/jmh-archetypes/jmh-java-benchmark-archetype/src/main/resources/archetype-resources/pom.xml" target="_blank" rel="noopener noreferrer">JHM examples<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a>.</p> <div class="language-java extra-class"><pre class="language-java"><code><span class="token generics"><span class="token punctuation"><</span>build<span class="token punctuation">></span></span>
<span class="token generics"><span class="token punctuation"><</span>plugins<span class="token punctuation">></span></span>
<span class="token generics"><span class="token punctuation"><</span>plugin<span class="token punctuation">></span></span>
<span class="token generics"><span class="token punctuation"><</span>groupId<span class="token punctuation">></span></span>org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>maven<span class="token punctuation">.</span>plugins<span class="token operator"><</span><span class="token operator">/</span>groupId<span class="token operator">></span>
<span class="token generics"><span class="token punctuation"><</span>artifactId<span class="token punctuation">></span></span>maven<span class="token operator">-</span>shade<span class="token operator">-</span>plugin<span class="token operator"><</span><span class="token operator">/</span>artifactId<span class="token operator">></span>
<span class="token generics"><span class="token punctuation"><</span>version<span class="token punctuation">></span></span><span class="token number">3.0</span><span class="token number">.0</span><span class="token operator"><</span><span class="token operator">/</span>version<span class="token operator">></span>
<span class="token generics"><span class="token punctuation"><</span>executions<span class="token punctuation">></span></span>
<span class="token generics"><span class="token punctuation"><</span>execution<span class="token punctuation">></span></span>
<span class="token generics"><span class="token punctuation"><</span>phase<span class="token punctuation">></span></span><span class="token keyword">package</span><span class="token operator"><</span><span class="token operator">/</span>phase<span class="token operator">></span>
<span class="token generics"><span class="token punctuation"><</span>goals<span class="token punctuation">></span></span>
<span class="token generics"><span class="token punctuation"><</span>goal<span class="token punctuation">></span></span>shade<span class="token operator"><</span><span class="token operator">/</span>goal<span class="token operator">></span>
<span class="token operator"><</span><span class="token operator">/</span>goals<span class="token operator">></span>
<span class="token generics"><span class="token punctuation"><</span>configuration<span class="token punctuation">></span></span>
<span class="token generics"><span class="token punctuation"><</span>finalName<span class="token punctuation">></span></span><span class="token operator">/</span>benchmarks<span class="token operator"><</span><span class="token operator">/</span>finalName<span class="token operator">></span>
<span class="token generics"><span class="token punctuation"><</span>transformers<span class="token punctuation">></span></span>
<span class="token operator"><</span>transformer
implementation<span class="token operator">=</span><span class="token string">"org.apache.maven.plugins.shade.resource.ManifestResourceTransformer"</span><span class="token operator">></span>
<span class="token generics"><span class="token punctuation"><</span>mainClass<span class="token punctuation">></span></span><span class="token class-name"><span class="token namespace">org<span class="token punctuation">.</span>openjdk<span class="token punctuation">.</span>jmh<span class="token punctuation">.</span></span>Main</span><span class="token operator"><</span><span class="token operator">/</span>mainClass<span class="token operator">></span>
<span class="token operator"><</span><span class="token operator">/</span>transformer<span class="token operator">></span>
<span class="token operator"><</span><span class="token operator">/</span>transformers<span class="token operator">></span>
<span class="token generics"><span class="token punctuation"><</span>filters<span class="token punctuation">></span></span>
<span class="token generics"><span class="token punctuation"><</span>filter<span class="token punctuation">></span></span>
<span class="token generics"><span class="token punctuation"><</span>artifact<span class="token punctuation">></span></span><span class="token operator">*</span><span class="token operator">:</span><span class="token operator">*</span><span class="token operator"><</span><span class="token operator">/</span>artifact<span class="token operator">></span>
<span class="token generics"><span class="token punctuation"><</span>excludes<span class="token punctuation">></span></span>
<span class="token generics"><span class="token punctuation"><</span>exclude<span class="token punctuation">></span></span>META<span class="token operator">-</span>INF<span class="token comment">/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-core</artifactId>
<version>1.18</version>
</dependency>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-generator-annprocess</artifactId>
<version>1.18</version>
</dependency>
</dependencies>
</span></code></pre></div><p>After this you need to write benchmark class itself:</p> <div class="language-java extra-class"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">benchmark</span><span class="token punctuation">;</span>
<span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>openjdk<span class="token punctuation">.</span>jmh<span class="token punctuation">.</span>annotations<span class="token punctuation">.</span></span><span class="token operator">*</span><span class="token punctuation">;</span>
<span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>openjdk<span class="token punctuation">.</span>jmh<span class="token punctuation">.</span>infra<span class="token punctuation">.</span></span><span class="token class-name">Blackhole</span><span class="token punctuation">;</span>
<span class="token keyword">import</span> <span class="token namespace">java<span class="token punctuation">.</span>util<span class="token punctuation">.</span></span><span class="token class-name">HashSet</span><span class="token punctuation">;</span>
<span class="token keyword">import</span> <span class="token namespace">java<span class="token punctuation">.</span>util<span class="token punctuation">.</span></span><span class="token class-name">Random</span><span class="token punctuation">;</span>
<span class="token keyword">import</span> <span class="token namespace">java<span class="token punctuation">.</span>util<span class="token punctuation">.</span></span><span class="token class-name">Set</span><span class="token punctuation">;</span>
<span class="token keyword">import</span> <span class="token namespace">java<span class="token punctuation">.</span>util<span class="token punctuation">.</span></span><span class="token class-name">TreeSet</span><span class="token punctuation">;</span>
<span class="token keyword">import</span> <span class="token namespace">java<span class="token punctuation">.</span>util<span class="token punctuation">.</span>concurrent<span class="token punctuation">.</span></span><span class="token class-name">TimeUnit</span><span class="token punctuation">;</span>
<span class="token annotation punctuation">@State</span><span class="token punctuation">(</span><span class="token class-name">Scope<span class="token punctuation">.</span>Thread</span><span class="token punctuation">)</span>
<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">CollectionFinderBenchmarkTest</span> <span class="token punctuation">{</span>
<span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token keyword">int</span> SET_SIZE <span class="token operator">=</span> <span class="token number">10000</span><span class="token punctuation">;</span>
<span class="token keyword">private</span> <span class="token class-name">Set</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> hashSet<span class="token punctuation">;</span>
<span class="token keyword">private</span> <span class="token class-name">Set</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">String</span><span class="token punctuation">></span></span> treeSet<span class="token punctuation">;</span>
<span class="token keyword">private</span> <span class="token class-name">String</span> stringToFind <span class="token operator">=</span> <span class="token string">"8888"</span><span class="token punctuation">;</span>
<span class="token annotation punctuation">@Setup</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">setupCollections</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
hashSet <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">HashSet</span><span class="token generics"><span class="token punctuation"><</span><span class="token punctuation">></span></span><span class="token punctuation">(</span>SET_SIZE<span class="token punctuation">)</span><span class="token punctuation">;</span>
treeSet <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">TreeSet</span><span class="token generics"><span class="token punctuation"><</span><span class="token punctuation">></span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator"><</span> SET_SIZE<span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">final</span> <span class="token class-name">String</span> value <span class="token operator">=</span> <span class="token class-name">String</span><span class="token punctuation">.</span><span class="token function">valueOf</span><span class="token punctuation">(</span>i<span class="token punctuation">)</span><span class="token punctuation">;</span>
hashSet<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span>value<span class="token punctuation">)</span><span class="token punctuation">;</span>
treeSet<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span>value<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
stringToFind <span class="token operator">=</span> <span class="token class-name">String</span><span class="token punctuation">.</span><span class="token function">valueOf</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">Random</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">nextInt</span><span class="token punctuation">(</span>SET_SIZE<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token annotation punctuation">@Benchmark</span>
<span class="token annotation punctuation">@BenchmarkMode</span><span class="token punctuation">(</span><span class="token class-name">Mode<span class="token punctuation">.</span>AverageTime</span><span class="token punctuation">)</span>
<span class="token annotation punctuation">@OutputTimeUnit</span><span class="token punctuation">(</span><span class="token class-name">TimeUnit</span><span class="token punctuation">.</span>NANOSECONDS<span class="token punctuation">)</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">testHashSet</span><span class="token punctuation">(</span><span class="token class-name">Blackhole</span> blackhole<span class="token punctuation">)</span> <span class="token punctuation">{</span>
blackhole<span class="token punctuation">.</span><span class="token function">consume</span><span class="token punctuation">(</span>hashSet<span class="token punctuation">.</span><span class="token function">contains</span><span class="token punctuation">(</span>stringToFind<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token annotation punctuation">@Benchmark</span>
<span class="token annotation punctuation">@BenchmarkMode</span><span class="token punctuation">(</span><span class="token class-name">Mode<span class="token punctuation">.</span>AverageTime</span><span class="token punctuation">)</span>
<span class="token annotation punctuation">@OutputTimeUnit</span><span class="token punctuation">(</span><span class="token class-name">TimeUnit</span><span class="token punctuation">.</span>NANOSECONDS<span class="token punctuation">)</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">testTreeSet</span><span class="token punctuation">(</span><span class="token class-name">Blackhole</span> blackhole<span class="token punctuation">)</span> <span class="token punctuation">{</span>
blackhole<span class="token punctuation">.</span><span class="token function">consume</span><span class="token punctuation">(</span>treeSet<span class="token punctuation">.</span><span class="token function">contains</span><span class="token punctuation">(</span>stringToFind<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre></div><p>Please keep in mind this <code>blackhole.consume()</code>, we'll get back to it later. Also we need main class for running benchmark:</p> <div class="language-java extra-class"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">benchmark</span><span class="token punctuation">;</span>
<span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>openjdk<span class="token punctuation">.</span>jmh<span class="token punctuation">.</span>runner<span class="token punctuation">.</span></span><span class="token class-name">Runner</span><span class="token punctuation">;</span>
<span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>openjdk<span class="token punctuation">.</span>jmh<span class="token punctuation">.</span>runner<span class="token punctuation">.</span></span><span class="token class-name">RunnerException</span><span class="token punctuation">;</span>
<span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>openjdk<span class="token punctuation">.</span>jmh<span class="token punctuation">.</span>runner<span class="token punctuation">.</span>options<span class="token punctuation">.</span></span><span class="token class-name">Options</span><span class="token punctuation">;</span>
<span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>openjdk<span class="token punctuation">.</span>jmh<span class="token punctuation">.</span>runner<span class="token punctuation">.</span>options<span class="token punctuation">.</span></span><span class="token class-name">OptionsBuilder</span><span class="token punctuation">;</span>
<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">BenchmarkMain</span> <span class="token punctuation">{</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">RunnerException</span> <span class="token punctuation">{</span>
<span class="token keyword">final</span> <span class="token class-name">Options</span> options <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">OptionsBuilder</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
<span class="token punctuation">.</span><span class="token function">include</span><span class="token punctuation">(</span><span class="token class-name">CollectionFinderBenchmarkTest</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">.</span><span class="token function">getSimpleName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
<span class="token punctuation">.</span><span class="token function">forks</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">)</span>
<span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">new</span> <span class="token class-name">Runner</span><span class="token punctuation">(</span>options<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">run</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre></div><p>And we're all set. We just need to run <code>mvn package</code> (it will create <code>benchmarks.jar</code> in your <code>/target</code> folder) and run our benchmark test:</p> <p><code>java -cp target/benchmarks.jar benchmark.BenchmarkMain</code></p> <p>And after some warmup and calculation iterations, we will have our results:</p> <div class="language-java extra-class"><pre class="language-java"><code># <span class="token class-name">Run</span> <span class="token class-name"><span class="token namespace">complete<span class="token punctuation">.</span></span> Total</span> time<span class="token operator">:</span> <span class="token number">00</span><span class="token operator">:</span><span class="token number">01</span><span class="token operator">:</span><span class="token number">21</span>
<span class="token class-name">Benchmark</span> <span class="token class-name">Mode</span> <span class="token class-name">Cnt</span> <span class="token class-name">Score</span> <span class="token class-name">Error</span> <span class="token class-name">Units</span>
<span class="token class-name">CollectionFinderBenchmarkTest</span><span class="token punctuation">.</span>testHashSet avgt <span class="token number">20</span> <span class="token number">9.940</span> ± <span class="token number">0.270</span> ns<span class="token operator">/</span>op
<span class="token class-name">CollectionFinderBenchmarkTest</span><span class="token punctuation">.</span>testTreeSet avgt <span class="token number">20</span> <span class="token number">98.858</span> ± <span class="token number">13.743</span> ns<span class="token operator">/</span>op
</code></pre></div><p>About that <code>blackhole.consume()</code>. If your calculations do not change the state of your application, java will most likely just ignore it. So, in order to avoid it, you can either make your benchmark methods return some value, or use <code>Blackhole</code> object to consume it.</p> <p>You can find more information about writing proper benchmarks in <a href="https://shipilev.net/blog/2014/nanotrusting-nanotime/" target="_blank" rel="noopener noreferrer">Aleksey Shipilëv's blog<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a>, in <a href="http://tutorials.jenkov.com/java-performance/jmh.html" target="_blank" rel="noopener noreferrer">Jacob Jenkov's blog<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a> and in java-performance blog: <a href="http://java-performance.info/jmh/" target="_blank" rel="noopener noreferrer">1<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a>, <a href="http://java-performance.info/introduction-jmh-profilers/" target="_blank" rel="noopener noreferrer">2<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a>.</p></div> <footer class="page-edit"><div class="edit-link"><a href="https://github.com/devtut/generate/edit/master/docs/java/benchmarks.md" target="_blank" rel="noopener noreferrer">Edit this page on GitHub</a> <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></div> <!----></footer> <div class="page-nav"><p class="inner"><span class="prev">
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