jmh

最新推荐文章于 2025-09-07 20:32:33 发布

转载最新推荐文章于 2025-09-07 20:32:33 发布 · 77 阅读

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原文链接：https://my.oschina.net/u/2457218/blog/1921659

文章标签：

#java #python

本文介绍了使用JMH（Java Microbenchmark Harness）进行微基准测试的两种方式：一是通过Maven创建专门的测试项目；二是为现有Maven项目添加必要的依赖和插件。此外，还提供了测试类的示例代码及更多资源链接。

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JMH，微基准测试引入方式

第一种方式，直接用maven创建微基准测试项目

mvn archetype:generate \
          -DinteractiveMode=false \
          -DarchetypeGroupId=org.openjdk.jmh \
          -DarchetypeArtifactId=jmh-java-benchmark-archetype \
          -DgroupId=org.sample \
          -DartifactId=test \
          -Dversion=1.0

第二种方式，在现有的maven项目上增加微基准测试的相关依赖

<jmh.version>1.17.4</jmh.version>

<dependencies>
    <dependency>
        <groupId>org.openjdk.jmh</groupId>
        <artifactId>jmh-core</artifactId>
        <version>${jmh.version}</version>
    </dependency>
    <dependency>
        <groupId>org.openjdk.jmh</groupId>
        <artifactId>jmh-generator-annprocess</artifactId>
        <version>${jmh.version}</version>
        <scope>provided</scope>
    </dependency>
</dependencies>>

maven的plugins中增加jmh的plugin

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-shade-plugin</artifactId>
    <version>2.2</version>
    <executions>
        <execution>
            <phase>package</phase>
            <goals>
                <goal>shade</goal>
            </goals>
            <configuration>
                <finalName>${uberjar.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.
                            http://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>
                        </excludes>
                    </filter>
                </filters>
            </configuration>
        </execution>
    </executions>
</plugin>

写测试类进行测试：

import org.openjdk.jmh.annotations.Benchmark;

public class MyBenchmark {

    @Benchmark
    public void testMethod() {
        // This is a demo/sample template for building your JMH benchmarks. Edit as needed.
        // Put your benchmark code here.
    }

}

http://tutorials.jenkov.com/java-performance/jmh.html#jmh-benchmark-modes

http://openjdk.java.net/projects/code-tools/jmh/

转载于:https://my.oschina.net/u/2457218/blog/1921659