public void initSingleStatisticMap() {
   effectiveSingleStatisticMap =
       new HashMap<StatisticType, SingleStatistic>(
           problemBenchmarkResult.getProblemStatisticList().size());
   for (ProblemStatistic problemStatistic : problemBenchmarkResult.getProblemStatisticList()) {
     SingleStatistic singleStatistic = problemStatistic.createSingleStatistic(this);
     effectiveSingleStatisticMap.put(singleStatistic.getStatisticType(), singleStatistic);
   }
   for (PureSingleStatistic pureSingleStatistic : pureSingleStatisticList) {
     effectiveSingleStatisticMap.put(pureSingleStatistic.getStatisticType(), pureSingleStatistic);
   }
 }