代码与时间关系统计

串行
10k - 1.25m  8s/m
2.5m        5s/m
5m - 10m    3s/m

并行
10k   1s/m
20k   1s/m
30k   0.7s/s
40k - 10m    0.68s/m

加速比
<1.25m  12
2.5m    7.6
5m-10m  4.4