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ENH: fft: reduce fft sizes for zero-padded arrays #10511

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ENH: fft: reduce fft sizes for zero-padded arrays #10511

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Reference issue

Closes #10510

What does this implement/fix?

For zero-padded fftn, this reduces the number of FFTs performed for array axes that are known to be all-zero.

@peterbell10 peterbell10 changed the title ENH: Reduce fft sizes for zero-padded arrays WIP, ENH: Reduce fft sizes for zero-padded arrays Jul 24, 2019
@peterbell10 peterbell10 mentioned this pull request Jul 24, 2019
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@ev-br ev-br added enhancement A new feature or improvement scipy.fft labels Aug 10, 2019
@lucascolley lucascolley marked this pull request as draft March 14, 2024 21:26
@lucascolley lucascolley changed the title WIP, ENH: Reduce fft sizes for zero-padded arrays WIP, ENH: fft: reduce fft sizes for zero-padded arrays May 18, 2024
@lucascolley lucascolley changed the title WIP, ENH: fft: reduce fft sizes for zero-padded arrays ENH: fft: reduce fft sizes for zero-padded arrays Jun 2, 2024
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ENH: zero-padded multi-D FFTs are sub-optimal
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@peterbell10 @ev-br