JMH的简单应用

原创

李子健

发布于 2023-08-01 21:50:49

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文章被收录于专栏：每日一善每日一善

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>

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