JMH的简单应用
原创
jmh是个java的压测工具，感觉工具看说明书就行，如果有过压测经验，很容易使用。
没有也不要紧。网上搜下BeanchMarkMode即可。如果多线程使用State即可。这两部分足以满足日常的需求。
前提是环境好使。大家可以看下我下面的环境配置，在idea2023上，使用java8是可以正常使用的哦
性能测试工具JMH
- 测试模式
- Throughput 吞吐量
- AverageTIme 平均时间
- SampleTime 采样统计时间
- SingleSHotTime 单次执行时间
- 常用的注解
- BeanchMark 执行压测
- BeanchMarkMode 压测模式，可以选上面的
- OutputTimeUnit 输出的时间单位
- State作用域：变量共享，线程共享，组间共享
- JMH之代码消除 ：需要考虑编译器会做编码优化，消除优化的代码
构建一个jmh的通用的构建流程
public class JMHXMain {
public static void main(String[] args) throws RunnerException {
final Options options = new OptionsBuilder()
.include(JMHXThroughput.class.getSimpleName())
.forks(1)
.build();
new Runner(options).run();
}
}
@State(Scope.Thread)
public class JMHXThroughput {
@Benchmark
@BenchmarkMode(Mode.Throughput)
@OutputTimeUnit(TimeUnit.SECONDS)
@Warmup(iterations = 5)
@Measurement(iterations = 4)
public void measureThroughput() throws InterruptedException {
TimeUnit.MILLISECONDS.sleep(100);
}
}增加依赖项
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-generator-annprocess</artifactId>
<version>1.36</version>
</dependency>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-core</artifactId>
<version>1.36</version>
</dependency>maven增加构建的build
<build>
<finalName>${project.artifactId}-${project.version}</finalName>
<!--pluginManagement-->
<plugins>
<!-- https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-compiler-plugin -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<!-- http://maven.apache.org/plugins/maven-compiler-plugin/index.html -->
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
<encoding>${project.build.sourceEncoding}</encoding>
</configuration>
</plugin>
<!-- https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-clean-plugin -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-clean-plugin</artifactId>
<version>3.2.0</version>
</plugin>
<!-- https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-surefire-plugin -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.2</version>
<configuration>
<!-- Skipping Tests 2018-02-01 16:00:42 -->
<skipTests>true</skipTests>
</configuration>
</plugin>
<!-- https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-jar-plugin -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.3.0</version>
</plugin>
<!-- https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-source-plugin -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-source-plugin</artifactId>
<version>3.2.1</version>
<executions>
<execution>
<!-- 源码打包并发布 2018-11-07 16:41 -->
<phase>package</phase>
<goals>
<goal>jar</goal>
</goals>
</execution>
</executions>
</plugin>
<!-- https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-shade-plugin -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.4.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<finalName>${uber-jar.name}</finalName>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>org.openjdk.jmh.Main</mainClass>
</transformer>
</transformers>
<filters>
<filter>
<!--
Shading signed JARs will fail without this.
https://stackoverflow.com/questions/999489/invalid-signature-file-when-attempting-to-run-a-jar
-->
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
<exclude>META-INF/MANIFEST.MF</exclude>
<exclude>LICENSE</exclude>
<exclude>THIRD-PARTY</exclude>
</excludes>
</filter>
</filters>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
<!--/pluginManagement-->
</build>原创声明：本文系作者授权腾讯云开发者社区发表，未经许可，不得转载。
如有侵权，请联系 cloudcommunity@tencent.com 删除。
原创声明：本文系作者授权腾讯云开发者社区发表，未经许可，不得转载。
如有侵权，请联系 cloudcommunity@tencent.com 删除。
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