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  • Slow performance of isel · 2 ✖

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558693816 https://github.com/pydata/xarray/issues/2227#issuecomment-558693816 https://api.github.com/repos/pydata/xarray/issues/2227 MDEyOklzc3VlQ29tbWVudDU1ODY5MzgxNg== Hoeze 1200058 2019-11-26T15:54:25Z 2019-11-26T15:54:25Z NONE

Hi, I'd like to understand how isel works exactly in conjunction with dask arrays. As it seems, #3481 propagates the isel operation onto each dask chunk for lazy evaluation. Is this correct?

 
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   Slow performance of isel 331668890
396675417 https://github.com/pydata/xarray/issues/2227#issuecomment-396675417 https://api.github.com/repos/pydata/xarray/issues/2227 MDEyOklzc3VlQ29tbWVudDM5NjY3NTQxNw== JohnMrziglod 4180033 2018-06-12T17:45:14Z 2018-06-12T17:45:14Z NONE

I am sorry @rabernat and @maxim-lian , the variable's name time and the simple example with the greater than filter are misleading. In general, it is about using a boolean mask via isel and that it is very slow. In my code, I am not able to use your workaround since my boolean mask is more complex.

 
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   Slow performance of isel 331668890

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