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  • dcherian · 2 ✖

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  • Slow performance of `DataArray.unstack()` from checking `variable.data` · 2 ✖

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  • MEMBER · 2 ✖
id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
953351408 https://github.com/pydata/xarray/issues/5902#issuecomment-953351408 https://api.github.com/repos/pydata/xarray/issues/5902 IC_kwDOAMm_X8440vzw dcherian 2448579 2021-10-27T22:16:17Z 2021-10-27T22:18:33Z MEMBER

(warning: untested code)

Instead of looking at all of self.variables we could ``` python nonindexes = set(self.variables) - set(self.indexes)

or alternatively make a list of multiindex variables names and exclude those

then the condition becomes

any(is_duck_dask_array(self.variables[v].data) for v in nonindexes) ``` 

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   Slow performance of `DataArray.unstack()` from checking `variable.data` 1037894157
953352129 https://github.com/pydata/xarray/issues/5902#issuecomment-953352129 https://api.github.com/repos/pydata/xarray/issues/5902 IC_kwDOAMm_X8440v_B dcherian 2448579 2021-10-27T22:17:39Z 2021-10-27T22:17:39Z MEMBER

PS: It doesn't seem like the bottleneck in your case but #5582 has an alternative proposal for unstacking dask arrays.

 
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   Slow performance of `DataArray.unstack()` from checking `variable.data` 1037894157

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