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
2034462507,PR_kwDOAMm_X85hniLB,8535,Filter null values before plotting,14371165,closed,0,,,3,2023-12-10T17:31:27Z,2023-12-13T15:44:55Z,2023-12-13T15:44:55Z,MEMBER,,0,pydata/xarray/pulls/8535,"I noticed that seaborn's plot was responding much faster than xarray's version with the same data. 
Turn's out seaborn drops any nulls: https://github.com/mwaskom/seaborn/blob/056413d7393e3daec597d430c076e45938d53376/seaborn/relational.py#L399

- [x] Tests added
- [x] User visible changes (including notable bug fixes) are documented in `whats-new.rst`

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