c9-core/plugins/c9.ide.run/runners-docker/Maven.run

{
    "cmd": ["mvn", "$command $args"],
    "default": true,
    "selector": "pom.xml",
    "env": {
        "MAVEN_OPTS": "-XX:MaxNewSize=64m -XX:+TieredCompilation -XX:TieredStopAtLevel=1 -XX:+CMSParallelRemarkEnabled -XX:+UseTLAB -XX:ParallelGCThreads=6"
    }
}