[WIP] xt::linalg::kron: support arguments of arbitrary number of dimensions #198
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lsix
changed the title
Before this commit, `xt::linalg::kron` only supports 2D arguments. This commit proposes to add support for argument with any number of dimensions. This change of behavior is coherent with what `numpy.kron` does. The current implementation is a performance step back compared to the previous one. Until a better generic implementation is found, keeping a couple of specialized implementations for the most used scenarios makes sense. Tested with `./test/test_xtensor_blas --gtest_filter=xlinalg.kron*`.
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I have pushed a revised implementation that has significantly better performances compared to the first one. However, it still is an order of magnitude slower than the original one for the 2D scenario. I intend to spend more time on this to improve things further and hopefully come up with a solution that is general and offers acceptable performances. |
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Before this commit,
xt::linalg::krononly supports 2D arguments. Thiscommit proposes to add support for argument with any number of
dimensions. This change of behavior is coherent with what
numpy.krondoes.
The current implementation is a performance step back compared to the
previous one. Until a better generic implementation is found, keeping a
couple of specialized implementations for the most used scenarios makes
sense.
Tested with
./test/test_xtensor_blas --gtest_filter=xlinalg.kron*.