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
2220470499,I_kwDOAMm_X86EWbDj,8902,opening a zarr dataset taking so much time,93967637,closed,0,,,10,2024-04-02T13:01:52Z,2024-04-04T07:49:51Z,2024-04-04T07:49:51Z,NONE,,,,"### What is your issue?

I have an era5 dataset stored in GCS bucket as zarr. It contains 273 weather related variables and 4 dimensions. It's an hourly stored data from 1940 to 2023.
When I try to open with `ds = xr.open_zarr(""gs://gcp-public-data-arco-era5/ar/full_37-1h-0p25deg-chunk-1.zarr-v3"")` it takes 90 seconds to actually finish the open call. 
The chunk scheme is `{ 'time': 1 }`. ","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/8902/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed,13221727,issue