10000 evaluations: Ubuntu > Windows > OS X
                   4608   > 2155    > 980  p/s

CPU：intel i7 7700
GPU：nvidia GTX1070

Windows 10:
leela: benchmark
200000 games in 7.59 seconds -> 26350 g/s (3293 g/s per thread)
Avg Len: 451.53 Score: -1.989495

Leela: netbench
2000 predictions in 2.03 seconds -> 985 p/s
10000 evaluations in 4.64 seconds -> 2155 p/s

OS X 10.12.5：
Leela: benchmark
200000 games in 6.63 seconds -> 30165 g/s (3770 g/s per thread)
Avg Len: 451.58 Score: -1.502100

Leela: netbench
2000 predictions in 3.76 seconds -> 531 p/s
10000 evaluations in 10.20 seconds -> 980 p/s

Ubuntu 16.04.2：
Leela: benchmark
200000 games in 6.05 seconds -> 33057 g/s (4132 g/s per thread)
Avg Len: 451.72 Score: -1.756510

Leela: netbench
2000 predictions in 1.68 seconds -> 1190 p/s
10000 evaluations in 2.20 seconds -> 4545 p/s

Ubuntu 17.04:
Leela: benchmark
200000 games in 6.40 seconds -> 31250 g/s (3906 g/s per thread)
Avg Len: 451.80 Score: -1.679700

Leela: netbench
2000 predictions in 1.65 seconds -> 1212 p/s
10000 evaluations in 2.17 seconds -> 4608 p/s