code: @Subscribe
    public void onSuiteResult(AggregatedSuiteResultEvent e) {
      long millis = e.getExecutionTime();
      String suiteName = e.getDescription().getDisplayName();
      
      List<Long> values = hints.get(suiteName);
      if (values == null) {
        hints.put(suiteName, values = new ArrayList<>());
      }
      values.add(millis);
      while (values.size() > historyLength)
        values.remove(0);
    }
docs: Remember execution time for all executed suites.