issue_comments: 250986266

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https://github.com/pydata/xarray/issues/1026#issuecomment-250986266 https://api.github.com/repos/pydata/xarray/issues/1026 250986266 MDEyOklzc3VlQ29tbWVudDI1MDk4NjI2Ng== 1217238 2016-10-02T18:20:36Z 2016-10-02T18:20:36Z MEMBER

This was an intentional change -- see https://github.com/dask/dask/pull/1469

Previously, we created lots of teeny tasks, which tended to negate any out of core benefits. The problem is that reshape promises an order to the elements it reshape which tends to split across existing chunks of dask arrays.

We could work around this in xarray by adding custom logic to stack for keeping chunks together when reshaping, but we can't do this upstream in dask because we need to make sure we keep all the arrays aligned.

 
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