Table 1
Periodogram computation times in seconds.
| Code | Platform | ⟨ tcalc ⟩ | σ(tcalc) | |||
|
|
||||||
| CPU implementation | ||||||
| nfftls | Dell Laptop | 5. 6 | 0. 057 | |||
| nfftls | Server | 5. 1 | 0. 039 | |||
| fasper | Dell Laptop | 42. | 1. 1 | |||
| fasper | Server | 30. | 1. 4 | |||
| GPU implementation | ||||||
| culsp | GeForce 8400 GS | 570. | 0. 0093 | |||
| culsp | Tesla C1060 | 20. 3 | 0. 00024 | |||
Notes. For comparison, we have listed the computation times of culsp, the GPU implemented code by Townsend (2010), as well as a code based on the function fasper of Press et al. (1992). We used an oversampling of 8 and a high-frequency control factor of 1, which yields a periodogram with Nf = 1 528 012 points, about the same number as the 1 528 064 points used in the runs of culsp.
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