h x

E ( h x , h t )

order

CPU

1/10

1.560e−05

*

0.010467s

1/20

3.921e−06

1.992

0.011315s

1/40

9.814e−07

1.998

0.017153s

1/80

2.454e−07

2.000

0.045929s

1/160

6.136e−08

2.000

0.149290s