issue_comments: 357336022

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https://github.com/pydata/xarray/issues/1823#issuecomment-357336022 https://api.github.com/repos/pydata/xarray/issues/1823 357336022 MDEyOklzc3VlQ29tbWVudDM1NzMzNjAyMg== 2443309 2018-01-12T19:46:12Z 2018-01-12T19:46:12Z MEMBER

@rabernat - Depending on the structure of the dataset, another possibility that would speed up some open_mfdataset tasks substantially is to implement the step of opening each file and getting its metadata in in some parallel way (dask/joblib/etc.) and either returning the just dataset schema or a picklable version of the dataset itself. I think this will only be able to work with autoclose=True but it could be quite useful when working with many files. 

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