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/pull/6150#issuecomment-1010380233,https://api.github.com/repos/pydata/xarray/issues/6150,1010380233,IC_kwDOAMm_X848OS3J,2448579,2022-01-11T21:35:19Z,2022-01-11T21:35:19Z,MEMBER,`ravel_multi_index` can  be slow.  Maybe that's it?,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,1098439498
https://github.com/pydata/xarray/pull/6150#issuecomment-1009657925,https://api.github.com/repos/pydata/xarray/issues/6150,1009657925,IC_kwDOAMm_X848LihF,14371165,2022-01-11T07:11:51Z,2022-01-11T07:11:51Z,MEMBER,"Hmm, this way doesn't seem faster on first glance?

```
[ 72.78%] ··· unstacking.Unstacking.time_unstack_fast                1.91±0.01ms
[ 72.96%] ··· unstacking.Unstacking.time_unstack_pandas_slow          13.9±0.1ms
[ 73.15%] ··· unstacking.Unstacking.time_unstack_slow                1.91±0.02ms
[ 73.33%] ··· unstacking.UnstackingDask.time_unstack_fast            21.8±0.08ms
[ 73.52%] ··· ...king.UnstackingDask.time_unstack_pandas_slow         14.6±0.1ms
[ 73.70%] ··· unstacking.UnstackingDask.time_unstack_slow            1.94±0.02ms
[ 73.89%] ··· ...nstackingSparse.peakmem_unstack_to_sparse_2d               204M
[ 74.07%] ··· ...nstackingSparse.peakmem_unstack_to_sparse_3d               204M
[ 74.26%] ··· unstacking.UnstackingSparse.time_unstack_fast           16.4±0.2ms
[ 74.44%] ··· ...ng.UnstackingSparse.time_unstack_pandas_slow         58.3±0.2ns
[ 74.63%] ··· unstacking.UnstackingSparse.time_unstack_slow              1.20±0s
[ 74.81%] ··· ...g.UnstackingSparse.time_unstack_to_sparse_2d            444±5μs
[ 75.00%] ··· ...g.UnstackingSparse.time_unstack_to_sparse_3d        4.36±0.02ms

[ 97.78%] ··· unstacking.Unstacking.time_unstack_fast                1.85±0.09ms
[ 97.96%] ··· unstacking.Unstacking.time_unstack_pandas_slow          13.2±0.6ms
[ 98.15%] ··· unstacking.Unstacking.time_unstack_slow                   3.80±2ms
[ 98.33%] ··· unstacking.UnstackingDask.time_unstack_fast              40.7±20ms
[ 98.52%] ··· ...king.UnstackingDask.time_unstack_pandas_slow          25.2±10ms
[ 98.70%] ··· unstacking.UnstackingDask.time_unstack_slow               4.00±2ms
[ 98.89%] ··· ...nstackingSparse.peakmem_unstack_to_sparse_2d               204M
[ 99.07%] ··· ...nstackingSparse.peakmem_unstack_to_sparse_3d               204M
[ 99.26%] ··· unstacking.UnstackingSparse.time_unstack_fast            28.1±10ms
[ 99.44%] ··· ...ng.UnstackingSparse.time_unstack_pandas_slow           113±60ns
+ grep 'Traceback \|failed\|PERFORMANCE DECREASED' benchmarks.log
[ 99.63%] ··· unstacking.UnstackingSparse.time_unstack_slow            1.09±0.6s
[ 99.81%] ··· ...g.UnstackingSparse.time_unstack_to_sparse_2d          864±400μs
[100.00%] ··· ...g.UnstackingSparse.time_unstack_to_sparse_3d           8.56±4ms
```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,1098439498