如何计时maven执行的不同阶段

Question

我有一个非常慢的maven构建.我想知道是否有一种方法来分析maven执行,以找出哪些是最耗时的步骤.

稍后我会想要比较旧版本(更快)的版本之间的这些时间,因此理想情况下它们应该是可以比较/差异/绘制的格式.

Answer 1

这是最快捷的方式:

export MAVEN_OPTS="-Dorg.slf4j.simpleLogger.dateTimeFormat=HH:mm:ss,SSS \
                   -Dorg.slf4j.simpleLogger.showDateTime=true" 
mvn test

结果是

MAVEN_OPTS="-Dorg.slf4j.simpleLogger.dateTimeFormat=HH:mm:ss,SSS -Dorg.slf4j.simpleLogger.showDateTime=true" mvn test
17:06:07,330 [INFO] Scanning for projects...
17:06:07,447 [INFO] 
17:06:07,447 [INFO] ------------------------------------------------------------------------
17:06:07,448 [INFO] Building bimble-server 0.0.1-SNAPSHOT
17:06:07,448 [INFO] ------------------------------------------------------------------------
17:06:07,747 [INFO] 
17:06:07,748 [INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ bimble-server ---

根据Stanley Hillner博客的信息:

Answer 2

开箱即用的解决方案是 takari maven profiler：https : //github.com/takari/maven-profiler

其页面的示例输出：

org.apache.maven:maven-core:3.1.2-SNAPSHOT

    clean 176ms
        org.apache.maven.plugins:maven-clean-plugin:2.5 (default-clean) 176ms

    initialize 408ms
        org.codehaus.mojo:buildnumber-maven-plugin:1.2 (create-noncanonicalrev) 349ms
        org.codehaus.mojo:buildnumber-maven-plugin:1.2 (create-buildnumber) 59ms

    generate-sources 408ms
        org.codehaus.modello:modello-maven-plugin:1.8.1 (standard) 369ms
        org.codehaus.modello:modello-maven-plugin:1.8.1 (standard) 28ms
        org.codehaus.modello:modello-maven-plugin:1.8.1 (standard) 11ms

    generate-resources 933ms
        org.apache.maven.plugins:maven-remote-resources-plugin:1.4 (default) 932ms

    process-resources 225ms
        org.apache.maven.plugins:maven-resources-plugin:2.6 (default-resources) 224ms

    compile 4s 522ms
        org.apache.maven.plugins:maven-compiler-plugin:2.5.1 (default-compile) 4s 522ms

    process-classes 6s 880ms
        org.codehaus.mojo:animal-sniffer-maven-plugin:1.6 (check-java-1.5-compat) 5s 814ms
        org.codehaus.plexus:plexus-component-metadata:1.5.5 (default) 946ms
        org.sonatype.plugins:sisu-maven-plugin:1.1 (default) 120ms

    process-test-resources 173ms
        org.apache.maven.plugins:maven-resources-plugin:2.6 (default-testResources) 173ms

    test-compile 818ms
        org.apache.maven.plugins:maven-compiler-plugin:2.5.1 (default-testCompile) 818ms

    process-test-classes 134ms
        org.codehaus.plexus:plexus-component-metadata:1.5.5 (default) 110ms
        org.sonatype.plugins:sisu-maven-plugin:1.1 (default) 23ms

    test 11s 306ms
        org.apache.maven.plugins:maven-surefire-plugin:2.12 (default-test) 11s 306ms

    package 1s 371ms
        org.apache.maven.plugins:maven-jar-plugin:2.4 (default-jar) 502ms
        org.apache.maven.plugins:maven-site-plugin:3.3 (attach-descriptor) 869ms

Answer 3

该功能已包含在 Maven3 中。这是相关的票证：https ://issues.apache.org/jira/browse/MNG-4639

如果您需要对 Maven2 做同样的事情，我建议您构建自己的插件，该插件可以挂钩到执行的所有阶段（或者只是您需要跟踪的阶段）。