[bug] Cascader becomes unresponsive when displaying large amount of items

[ifrost]

Bug description

• Grafana version: 11.2.0
• Plugin version: 0.1.12

Steps to reproduce

1. Load > 10000 service names in the app (mock the response or hardcode in the code)
2. Cascader selector to change service name becomes unresponsive or very slow

Profiles selector is also also affected but it should never have that many profile types.

Actual behaviour

The time between click and showing the dropdown increases above 200ms

Expected behaviour

The cascader should open immediately. Not all results needs to be rendered but it should be possible to search in all items.

Proposed solutions

• Investigate why Cascader is slow, try to fix in grafana-ui
• Switch to a different component (maybe Combobox when it's ready: Make Combobox Storybook story public, with indev disclaimer grafana#93042)
• Limit number of items passed to the component (though ensure all are searchable)

[github-actions]

This issue has been automatically marked as stale because it has not had activity in the last 90 days. It will be closed in 2 weeks if no further activity occurs.

[ifrost]

+1