import java.util.concurrent.TimeUnit

// Log timings per task.
class TimingsListener implements TaskExecutionListener, BuildListener {
    private long startTime
    private timings = []

    @Override
    void beforeExecute(Task task) {
        startTime = System.nanoTime()
    }

    @Override
    void afterExecute(Task task, TaskState taskState) {
        def ms = TimeUnit.MILLISECONDS.convert(System.nanoTime() - startTime, TimeUnit.NANOSECONDS)
        timings.add(new Tuple2<Integer, String>(ms, task.path))
        task.project.logger.warn "${task.path} took ${ms}ms"
    }

    @Override
    void buildFinished(BuildResult result) {
        println "Task timings:"
        def tmp = timings.toSorted(new Comparator<Tuple2<Integer, String>>() {
            @Override
            int compare(Tuple2<Integer, String> o, Tuple2<Integer, String> t1) {
                return o.first - t1.first
            }
        })
        for (timing in tmp) {
            if (timing.first >= 1000) {
                printf "%ss  %s\n", timing.first / 1000, timing.second
            }
        }
    }

    @Override
    void projectsEvaluated(Gradle gradle) {}

    @Override
    void projectsLoaded(Gradle gradle) {}

    @Override
    void settingsEvaluated(Settings settings) {}
}

gradle.addListener new TimingsListener()