issues: 1176745736

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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
1176745736 PR_kwDOAMm_X840z4zt 6400 Speed-up multi-index html repr + add display_values_threshold option 4160723 closed 0     3 2022-03-22T12:57:37Z 2022-03-29T07:10:22Z 2022-03-29T07:05:32Z MEMBER   0 pydata/xarray/pulls/6400

This adds PandasMultiIndexingAdapter._repr_html_ that can greatly speed-up the html repr of Xarray objects with multi-indexes.

This optimized _repr_html_ implementation is now used for formatting the array detailed view of all multi-index coordinates in the html repr, instead of converting the full index and each levels to numpy arrays before formatting them.

```python import xarray as xr

ds = xr.tutorial.load_dataset("air_temperature") da = ds["air"].stack(z=[...])

da.shape

(3869000,)

%timeit -n 1 -r 1 da.repr_html()

9.96 ms !

```

  • [x] Closes #5529
  • [x] User visible changes (including notable bug fixes) are documented in whats-new.rst
 
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