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1
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Improve the performance of marker and cluster rendering when the marker count is increased above threshold

Case 1: Currently Maps component can render 700 markers with clusters without any performance slowness in the rendering, zooming and panning operations. When the markers are increased beyond this threshold, the performance delay will be increased. 
What we do in this process is we will compare the position of each marker with other markers to cluster the nearby markers. Once that process is completed, we will run the cluster logic again to compare the further nearby markers to increase the accuracy. Due to this multiple clustering process, the performance slowness is resulted.

Case 2: Currently Maps component can render 5000 markers without animation and clustering. There will be no performance slowness in 
the rendering, zooming and panning operations. 
When the markers are increased beyond this threshold, the performance delay will be increased.

We need to improve the above 2 cases to a possible extent and there must be a optimal performance in the component when rendered in mobile device too.