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
1441649908,I_kwDOAMm_X85V7dT0,7274,Using open_mfdataset the size of the final data becomes huge,89445148,closed,0,,,2,2022-11-09T08:32:07Z,2022-11-09T09:50:40Z,2022-11-09T09:50:39Z,NONE,,,,"### What is your issue?

Hi, 

I've been struggling with open_mfdataset because of the size of the combined final data. I have 365 files whose size in the folder was 2.2 Gb aprox., but when I open them with open_mfdataset the size becomes 11 Gb. Is there a way to avoid it? 

<img width=""267"" alt=""image"" src=""https://user-images.githubusercontent.com/89445148/200779136-3c888ab3-e959-4006-a486-c3268e71a82f.png"">

<img width=""568"" alt=""image"" src=""https://user-images.githubusercontent.com/89445148/200778737-54fd6434-c018-438a-86f9-a8424df889b8.png"">
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