Slow loading of map containing VectorLayer with many complex geometries

Hi. We have a map containing VectorLayer with detailed geometries (of type Polygon) for each region of Russia. Opening screen with that map can take 3-10 seconds (and every refresh of that VectorLayer after takes the same time). As can be seen in attached debug/profiling screenshots - most of the time is spent on stringifying JsonValue, which results in 63Mb string as a response for the web-client. Is there any workaround to speed up working with such kind of geo-data?
debug-json profiling

Hi, @bobpertrov

Thank you for your report!

We have some ideas how to speed up this process, so we are planning to fix this issue in the next release.