How to time the different stages of maven execution

Question

I have a maven build that is extremely slow. I would like to know whether there is a way to profile maven execution in order to find out which are the most time-consuming st

Answer 1

Out of the box solution is the takari maven profiler: https://github.com/takari/maven-profiler

Sample output from its page:

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