h

$E_{\infty }\left(h,h_t\right)$

order

CPU

1/10

2.072e−02

*

0.045s

1/20

5.247e−03

1.982

0.055

1/40

1.316e−03

1.995

0.080s

1/80

3.296e−04

1.998

0.325s

1/160

8.240e−05

2.000

1.319s