Performance tests usage guide

Hello,

I want to do performance tests on my Camunda app.
I can’t find in the docs a usage guide:

The only reference I could find is this question in the forum:

Is there any usage guide for this specific task?

In addition, I tried to follow the above answer, but I can’t seem to get it working:
In the initialisation of the performanceTest() I have a runtime exception with the configuration is null when trying to perform the assignment of the platform here:

  protected PerfTestBuilder performanceTest() {
        PerfTestConfiguration configuration = this.testConfigurationRule.getPerformanceTestConfiguration();
        configuration.setPlatform("camunda BPM");
        return new PerfTestBuilder(configuration, this.resultRecorderRule);
    }