optaplanner-benchmark/src/main/java/org/optaplanner/benchmark/impl/result/SingleBenchmarkResult.java
protected static SingleBenchmarkResult createMerge(
            SolverBenchmarkResult solverBenchmarkResult, ProblemBenchmarkResult problemBenchmarkResult,
            SingleBenchmarkResult oldResult) {
        SingleBenchmarkResult newResult = new SingleBenchmarkResult(solverBenchmarkResult, problemBenchmarkResult);
        newResult.subSingleBenchmarkResultList = new ArrayList<>(oldResult.getSubSingleBenchmarkResultList().size());
        int subSingleBenchmarkIndex = 0;
        for (SubSingleBenchmarkResult oldSubResult : oldResult.subSingleBenchmarkResultList) {
            SubSingleBenchmarkResult.createMerge(newResult, oldSubResult, subSingleBenchmarkIndex);
            subSingleBenchmarkIndex++;
        }
        newResult.median = oldResult.median;
        newResult.best = oldResult.best;
        newResult.worst = oldResult.worst;
        solverBenchmarkResult.getSingleBenchmarkResultList().add(newResult);
        problemBenchmarkResult.getSingleBenchmarkResultList().add(newResult);
        return newResult;
    }
protected static SingleBenchmarkResult createMerge(
            SolverBenchmarkResult solverBenchmarkResult, ProblemBenchmarkResult problemBenchmarkResult,
            SingleBenchmarkResult oldResult) {
        SingleBenchmarkResult newResult = new SingleBenchmarkResult(solverBenchmarkResult, problemBenchmarkResult);
        newResult.subSingleBenchmarkResultList = new ArrayList<>(oldResult.getSubSingleBenchmarkResultList().size());
        int subSingleBenchmarkIndex = 0;
        for (SubSingleBenchmarkResult oldSubResult : oldResult.subSingleBenchmarkResultList) {
            SubSingleBenchmarkResult.createMerge(newResult, oldSubResult, subSingleBenchmarkIndex);
            subSingleBenchmarkIndex++;
        }
        newResult.median = oldResult.median;
        newResult.best = oldResult.best;
        newResult.worst = oldResult.worst;
        solverBenchmarkResult.getSingleBenchmarkResultList().add(newResult);
        problemBenchmarkResult.getSingleBenchmarkResultList().add(newResult);
        return newResult;
    }
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