html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/pull/2639#issuecomment-451287136,https://api.github.com/repos/pydata/xarray/issues/2639,451287136,MDEyOklzc3VlQ29tbWVudDQ1MTI4NzEzNg==,1217238,2019-01-03T21:44:21Z,2019-01-03T21:44:21Z,MEMBER,"> > (This PR) Indexes are recreated from coordinates every time a new DataArray or Dataset is created.
> 
> Does it add some overhead (though I don't see any reason of it)?

I suppose another option would be to leave `self._indexes = None` in the constructor, and only set default values for `self._indexes` when the `indexes` property is accessed.

I think we do something like for a few other attributes already.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,395045813
https://github.com/pydata/xarray/pull/2639#issuecomment-451271931,https://api.github.com/repos/pydata/xarray/issues/2639,451271931,MDEyOklzc3VlQ29tbWVudDQ1MTI3MTkzMQ==,6815844,2019-01-03T20:46:53Z,2019-01-03T20:46:53Z,MEMBER,"@shoyer 

It looks nice and reasonable to me.

> (This PR) Indexes are recreated from coordinates every time a new DataArray or Dataset is created.

Does it add some overhead (though I don't see any reason of it)?

","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,395045813