public static DelayPostprocessor getFastPostprocessor() {
    if (sFastPostprocessor == null) {
      sFastPostprocessor = new DelayPostprocessor(5);
    }
    return sFastPostprocessor;
  }
This is a Postprocessor which just introduce a delay
samples/scrollperf/src/main/java/com/facebook/samples/scrollperf/postprocessor/DelayPostprocessor.java