issue_comments: 704064370

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https://github.com/pydata/xarray/issues/4482#issuecomment-704064370 https://api.github.com/repos/pydata/xarray/issues/4482 704064370 MDEyOklzc3VlQ29tbWVudDcwNDA2NDM3MA== 1217238 2020-10-06T06:38:51Z 2020-10-06T06:38:51Z MEMBER

I agree this would be welcome! Even if it isn't much faster than the options already shown here, at least we could point users to the best option we know of.

I suspect achieving the full speed of dot() with skip-NA support is impossible, but we can probably do much better. I might start by prototyping something in Numba, just to get a sense of what is achievable with a low-level approach. But keep in mind that functions like np.dot and np.einsum ("GEMM") are a few of the most highly optimized routines in numerical computing.

 
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