gosfft

Simple FFT (SFFT) is a simple FFT library that is based on Gonum's FFT routine. It implements a simple interface for 1D, 2D and 3D transforms.

Examples

Below is a selection of examples whoen

1D fourier transform

Fourier transform of a square pulse

2D fourier transform

Fourier transform of a square

3D fourier transform

Fourier transform of a 3D cube

Parallelization

GOSFFT implements parallel versions of the multidimensional FFTs. In the following testcase a 2D 128 x 128 matrix is Fourier Transformed. The following results where obtained (Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz)

Number of workers	Execution time per FFT
1	1.34 ms
2	0.85 ms
4	0.67 ms
8	0.45 ms

The testcase runs a similar test in 3D for 128 x 128 x 128 dataset. The timing results are shown below

Number of workers	Execution time per FFT
1	280 ms
2	146 ms
4	87 ms
8	68 ms