id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,active_lock_reason,draft,pull_request,body,reactions,performed_via_github_app,state_reason,repo,type
988158051,MDU6SXNzdWU5ODgxNTgwNTE=,5764,Implement __sizeof__ on objects?,5635139,open,0,,,6,2021-09-03T23:36:53Z,2023-12-19T18:23:08Z,,MEMBER,,,,"<!-- Please do a quick search of existing issues to make sure that this has not been asked before. -->

**Is your feature request related to a problem? Please describe.**
Currently `ds.nbytes` returns the size of the data.

But `sys.getsizeof(ds)` returns a very small number.

**Describe the solution you'd like**
If we implement `__sizeof__` on DataArrays & Datasets, this would work. 

I think that would be something like `ds.nbytes` + the size of the `ds` container, + maybe attrs if those aren't handled by `.nbytes`?","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/5764/reactions"", ""total_count"": 2, ""+1"": 2, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,reopened,13221727,issue