pierrejego opened a new issue, #37843: URL: https://github.com/apache/superset/issues/37843
### Bug description The Thematic Map (Cartodiagram) chart is very slow when using a polygon layer with a large number of polygons. Rendering becomes sluggish because geographic entities are parsed repeatedly. This seems related to how geometries are parsed in the cartodiagram plugin. To Reproduce Go to dashboard with a chart containing large number of polygon See performance issues (very slow rendering when polygon count is high) Expected behavior The map should render polygons smoothly, even with large polygon layers, without repeatedly reparsing geometries. ### Screenshots/recordings  ### Superset version 5.0.0 ### Python version 3.9 ### Node version 16 ### Browser Chrome ### Additional context This issue seems caused by repeated parsing of geographic entities, which increases computation time on large polygon layers. The likely fix is to limit how often geometries are parsed and optimize the parsing logic. This is only for https://github.com/terrestris/superset/tree/5.0.0-custom/superset-frontend/plugins/plugin-chart-cartodiagram One way to make a quick win is to use simple geom instead of geom ST_SimplifyPreserveTopology(geom, 50) AS geom PR in progress ### Checklist - [x] I have searched Superset docs and Slack and didn't find a solution to my problem. - [ ] I have searched the GitHub issue tracker and didn't find a similar bug report. - [x] I have checked Superset's logs for errors and if I found a relevant Python stacktrace, I included it here as text in the "additional context" section. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
