dosubot[bot] commented on issue #43385: URL: https://github.com/apache/superset/issues/43385#issuecomment-5369751945
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No loading spinner is wired into the button's `onClick` handler, so the click appears to do nothing while the browser unloads the heavy list page and loads the dashboard editor. The delay you're seeing (~48s) is likely dominated by the list page's data-loading cost: with ~1000 dashboards, the list API joins tags, owners, and roles across all rows. **Why saving takes ~205s** The `PUT /api/v1/dashboard/<pk>` endpoint itself should be fast for a single dashboard. The more likely culprit is a post-save code path that triggers a re-fetch of the full dashboard list. It would help to check the Network tab during the save to confirm whether the bottleneck is the `PUT` or a subsequent `GET /api/v1/dashboard/` list call. **Relevant merged fixes (may not be in your 6.1.0 build)** 1. **[PR #29121](https://github.com/apache/superset/pull/29121)** — Removed `css`, `position_json`, and `json_metadata` from `list_columns`. The author reported list loads dropping from 2–3 seconds to near-instant. These fields are indeed absent from `list_columns` in the [current `api.py`](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset/dashboards/api.py#L191-L221), so if your 6.1.0 build doesn't include this PR, the list payload for 1000 dashboards would be enormous. 2. **[PR #28609](https://github.com/apache/superset/pull/28609)** — Added a `select_columns` query parameter so the frontend requests only the columns it needs, reducing average list API response from ~120ms to ~16ms. 3. **[PR #38567](https://github.com/apache/superset/pull/38567)** — Removes `thumbnail_url` from the list API to avoid expensive per-dashboard digest computation. Notably, the current `api.py` [still includes `thumbnail_url` in `list_columns`](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset/dashboards/api.py#L197), so this PR may not yet be in a released version. 4. **[PR #36246](https://github.com/apache/superset/pull/36246)** — Added a `DASHBOARD_LIST_CUSTOM_TAGS_ONLY` config flag that filters implicit tags at the SQL JOIN level, reducing both query time and payload size. **Suggestions** - Check whether PRs #29121 and #28609 are included in your 6.1.0 build — the list payload size is the most likely root cause of the 48s delay. - If you have the `TAGGING_SYSTEM` feature flag enabled, try setting `DASHBOARD_LIST_CUSTOM_TAGS_ONLY = True` in your config. - For the save latency, capture which specific API call is slow in the Network tab. If it's a list re-fetch (`GET /api/v1/dashboard/`) rather than the `PUT`, the fix would be to avoid re-fetching the full list after save. - The missing loading spinner on "+ Dashboard" is a separate, straightforward frontend fix — the [onClick handler](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset-frontend/src/pages/DashboardList/index.tsx#L704-L706) should set a loading state before calling `navigateTo`. <!-- Dosu Comment Footer --> *To reply, just mention [@dosu](<https://go.dosu.dev/dosubot?utm_source=github&utm_medium=bot-comment&utm_campaign=github-comment-footer-20260415&utm_content=reply-with-mention&utm_term=apache%2Fsuperset>).* --- Share context across your team and agents. Try [Dosu](https://dosu.dev?utm_source=github&utm_medium=bot-comment&utm_campaign=github-comment-footer-20260415&utm_content=knowledge-infrastructure-tagline&utm_term=apache%2Fsuperset). 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