. Author manuscript; available in PMC: 2018 Nov 21.

Published in final edited form as: SIAM J Sci Comput. 2017 Nov 21;39(6):B1064–B1101. doi: 10.1137/16M1070475

Table 13.

Wall clock times for applying one FFT or one cubic spline interpolation step with respect to different grid sizes. The timings are obtained for the fftn and interp2 functions in Matlab R2013a on a Linux cluster with Intel Xeon X5650 Westmere EP 6-core processors at 2.67GHz with 24GB DDR3-1333 memory.

n_{x}^{i}

FFTs

IPs

factor

3.03E−5

4.98E−3

1.64E+2

3.79E−5

2.43E−3

6.40E+1

1.21E−4

2.90E−3

2.40E+1

128

3.22E−4

5.14E−3

1.59E+1

256

8.86E−4

2.24E−2

2.53E+1

512

3.83E−3

1.42E−1

3.70E+1

1024

1.30E−2

6.07E−1

4.69E+1