There is a task to place 27000 points of sale on google maps + clustering + infoWindow. At the moment, this is implemented through a normal loop for(point of poits){...} that adds markers to the map. There is a problem with high memory consumption and high load on the browser. I will be grateful for your help.
I would take one of three approaches.
The WebGL solutions will be higher performance but with added complexity or increase in bundle size.
This sample walks through adding an <img> to the map, but you can do much the same with some css positioning and many HTMLElements representing each point.