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Perform intermediate FFTs in-place #20

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jipolanco opened this issue Sep 3, 2020 · 0 comments
Open

Perform intermediate FFTs in-place #20

jipolanco opened this issue Sep 3, 2020 · 0 comments
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performance

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@jipolanco
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For out-of-place FFTs, it should be possible to perform some of the intermediate FFTs in-place, which may lead to memory savings and maybe a small speed-up.

For instance, a 3D r2c FFT is composed of three FFTs: RFFT(x) -> FFT(y) -> FFT(z). Here, the c2c FFTs could be done in-place.
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