Improve st.line_chart hovering performance
#13156
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Pull request overview
This PR improves the hovering performance of st.line_chart when working with large datasets by optimizing the hover interaction implementation.
Key Changes:
- Introduces a threshold-based throttling mechanism for hover events on large datasets (>1000 points)
- Refactors hover tooltip rendering from conditional opacity to filter-based approach
- Updates mouse event handling from
pointerover/pointerouttomousemove/mouseleave
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Describe your changes
Improves the hovering performance of
st.line_chartwith larger datasets.Before:
Screen.Recording.2025-11-28.at.15.35.32.mov
After:
Screen.Recording.2025-11-28.at.15.35.01.mov
GitHub Issue Link (if applicable)
st.line_chartelements #13154Testing Plan
Contribution License Agreement
By submitting this pull request you agree that all contributions to this project are made under the Apache 2.0 license.