[niladrix719]

Summary

Hovering a heatmap cell will show percentile information in tooltip now

fixes #1911

Screenshots or video

How to test on Vercel preview

Preview routes: /search

Steps:

1. Confirm a trace source (e.g. "otel_traces") is selected in the source selector; if not, select it.
2. Click the "Event Deltas" tab in the left filter panel.
3. Wait for the heatmap chart to render above the "Select an area on the chart above to enable comparisons" row.
4. Hover the mouse over one of the colored heatmap cells.
5. Verify the tooltip shows a "Y Value" line with a percentile in parentheses, e.g. "Y Value: 792ms (p99.1)".

[vercel]

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[changeset-bot]

🦋 Changeset detected

Latest commit: 188848f

The changes in this PR will be included in the next version bump.

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[greptile-apps]

Greptile Summary

The PR adds cumulative percentile context to heatmap hover tooltips and unit coverage for aggregation, empty data, and bucket ordering.

• Aggregates event counts across time buckets by Y bucket.
• Displays the cumulative percentile alongside the hovered Y value.
• Adds a patch changeset for @hyperdx/app.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
packages/app/src/components/DBHeatmapChart.tsx	Adds cumulative per-bucket percentile computation and renders the result in the heatmap hover tooltip.
packages/app/src/components/tests/DBHeatmapChart.test.ts	Covers pooled cumulative percentages, empty distributions, and numeric bucket ordering.
.changeset/heatmap-tooltip-percentile.md	Records the tooltip enhancement as a patch release for the app package.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart LR
  Data[Heatmap data] --> Aggregate[Aggregate counts by Y bucket]
  Aggregate --> Cumulative[Compute cumulative percentages]
  Hover[Hovered heatmap cell] --> Lookup[Look up Y-bucket percentile]
  Cumulative --> Lookup
  Lookup --> Tooltip[Render Y Value with percentile]

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_{Reviews (2): Last reviewed commit: "Merge branch 'main' into heatmap-toolpit..." | Re-trigger Greptile}

[pulpdrew]

LGTM, thanks for the contribution!