issue_comments: 1526489103

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https://github.com/pydata/xarray/issues/7764#issuecomment-1526489103 https://api.github.com/repos/pydata/xarray/issues/7764 1526489103 IC_kwDOAMm_X85a_GAP 1217238 2023-04-27T21:15:23Z 2023-04-27T21:15:23Z MEMBER

Allowing for explicitly passing a function matching the einsum interface is certainly more flexible than a boolean or enum argument, so @TomNicholas's suggestion of einsum_func=np.einsum is the version I would suggest.

The overhead from optimizing contraction paths is probably very small relative to the overhead of Xarray in general, so I would support setting optimize=True by default in Xarray, and/or using opt-einsum automatically if it is installed. JAX always use opt-einsum (opt-einsum is actually a hard dependency) and I have never heard any complaints.

 
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