Implement tree-reductions for cov/corr #1758
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Implement tree-reductions for `cov` and `corr` methods in `dask.dataframe`. Because the intermediates here are nd-arrays (instead of dataframes), a special-cased implementation of the reduction algorithm is used instead of using `aca` directly. Partially addresses dask#1672.
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Implement tree-reductions for
covandcorrmethods indask.dataframe. Because the intermediates here are nd-arrays (insteadof dataframes), a special-cased implementation of the reduction
algorithm is used instead of using
acadirectly.Partially addresses #1672.