The method is obviously better than those of Flash Sort 、 Proportion Split Sort 、 2 Course Merging Sort and Straight K Course Merging Sort in dealing with the sorting problem of large scale gathering. 而且在处理上述大规模汇总排序问题时,映射归并排序速度明显优于FlashSort、ProportionSplitSort、2路重复的K路归并排序和直接K路归并排序等算法。