performance with unchanged marker array

[jektvik]

I'm struggling to squeeze performance out of the marker cluster in a situation where it shouldn't even be rerendering.

     <MarkerClusterGroup chunkedLoading={true}>
        {filteredMarkers?.map((c) => (
          <Marker key={c.index} position={[c.lat, c.lng]} title={c.skoolName}>
          </Marker>
        ))}
      </MarkerClusterGroup>

filteredMarkers is an array which gets modified by an external slider, so I can justify that there's some jerking when the array changes in length. But why am i witnessing slowdowns even when filteredMarkers stays exactly the same ? (agreeably, the object reference changes but the values tay exactly the same and the key prop should take care of this). The array size is a few thousand elements. Yet the browser is doing an unreasonable amount of calls to addLayer in MarketClousterGroup.js. (trace attached) Trace-20240424T141121.zip