issue_comments: 766504338

This data as json

html_url issue_url id node_id user created_at updated_at author_association body reactions performed_via_github_app issue
https://github.com/pydata/xarray/issues/4789#issuecomment-766504338 https://api.github.com/repos/pydata/xarray/issues/4789 766504338 MDEyOklzc3VlQ29tbWVudDc2NjUwNDMzOA== 5635139 2021-01-25T02:46:40Z 2021-01-25T02:46:40Z MEMBER

One quick observation is that it's related to the MultiIndex — if we swap out the index for idx = pd.Index(range(100_000_000)), the time drops from 1.8s to 812mics

 
{
    "total_count": 0,
    "+1": 0,
    "-1": 0,
    "laugh": 0,
    "hooray": 0,
    "confused": 0,
    "heart": 0,
    "rocket": 0,
    "eyes": 0
}
   782943813