README.md

Maven profiler

The Tesla profiler is a simple EventSpy implementation that gathers timing information. It collects the time it takes to execute each mojo and gathers them within the phase they run. This was originally written to find a particular hotspot and it not formatted particularly well and definitely needs improvement.

To profile your build you need to install the profiling extension your Maven/Tesla distribution. Find the latest version in Maven Central and install it in the ${M2_HOME}/lib/ext directory, or add it to .mvn/extensions.xml.

<?xml version="1.0" encoding="UTF-8"?>
<extensions>
    <extension>
        <groupId>io.takari.maven</groupId>
        <artifactId>maven-profiler</artifactId>
        <version>1.0.0</version>
  </extension>
</extensions>

To activate the profiling you need to enable the maven.profile system property:

mvn clean install -Dmaven.profile

Here's an example of what the output will look like:

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