issue_comments: 438345386

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https://github.com/pydata/xarray/issues/1666#issuecomment-438345386 https://api.github.com/repos/pydata/xarray/issues/1666 438345386 MDEyOklzc3VlQ29tbWVudDQzODM0NTM4Ng== 7441788 2018-11-13T16:50:08Z 2018-11-13T16:52:13Z CONTRIBUTOR

The problem I have with Rolling.construct is the same that I have with Rolling.reduce: it's very (potentially) memory-inefficient. E.g. consider a 1000x1000x1000 array for which I want to apply rolling window of length 500 along the final dimension; I believe Rolling.construct/reduce will construct a 1000x1000x1000x500 array. This can quickly get out of hand.

 
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