MarkerClusterGroup very low performance with large number of markers

[TiagoPortfolio]

Hello!

In my environment, I am using:

• "leaflet": "1.7.1"
• "react-leaflet": "2.7.0"
• "react-leaflet-markercluster": "2.0.0"

Tried to load around 1000 markers but the performance is very very low. Did some debugging and it looks like the clusters are being recalculated unnecessarily for some reason.

I found a sandbox to test this from this comment https://github.com/yuzhva/react-leaflet-markercluster/issues/21#issuecomment-610924137: https://codesandbox.io/s/gallant-leakey-qqupl?file=/src/App.js

Sandbox env:

• "leaflet": "1.7.1"
• "leaflet.markercluster": "1.4.1"
• "react-leaflet": "3.0.2"
• "react-leaflet-markercluster": "3.0.0-rc1"

Does the sandbox need leaflet.markercluster package? I am not using it on my local env.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[meliborn]

Same here, totally useless with 10k markers.

[leverglowh]

To me the codesandbox works just fine, I can move the map and zoom in/out without problems. Is this issue resolved then?

[TiagoPortfolio]

To me the codesandbox works just fine, I can move the map and zoom in/out without problems. Is this issue resolved then?

It is working fine for me as well now. Not sure how the performance was improved since there were no new commits...