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 117297089,MDExOlB1bGxSZXF1ZXN0NTA5MTEzMzQ=,661,Document pandas' better groupby performance.,1322974,closed,0,,,1,2015-11-17T07:04:50Z,2015-11-17T09:10:04Z,2015-11-17T08:54:31Z,CONTRIBUTOR,,0,pydata/xarray/pulls/661,"cf. #659. ","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/661/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull