issue_comments: 1254063029

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https://github.com/pydata/xarray/issues/7062#issuecomment-1254063029 https://api.github.com/repos/pydata/xarray/issues/7062 1254063029 IC_kwDOAMm_X85Kv3u1 39069044 2022-09-21T18:15:46Z 2022-09-21T18:15:46Z CONTRIBUTOR

Without bottleneck, I guess both options from the MVCE above get routed through _mean: ```python

xr.set_options(use_bottleneck=False) da = xr.DataArray([1,2,3], coords={'x':[1,2,3]}).astype('float32') da.rolling(x=3, min_periods=1).mean().dtype dtype('float64') da.chunk({'x':1}).rolling(x=3, min_periods=1).mean().dtype dtype('float64') ```

And after #7063: ```python

xr.set_options(use_bottleneck=False) da = xr.DataArray([1,2,3], coords={'x':[1,2,3]}).astype('float32') da.rolling(x=3, min_periods=1).mean().dtype dtype('float32') da.chunk({'x':1}).rolling(x=3, min_periods=1).mean().dtype dtype('float32') ```

 
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