Adding Vector layer with text is slow

[verebelyin]

Hi,

I try to load ~1000 features with texts, but it takes a lot of time (~15 sec on desktop, ~120 sec on mobile) to add them, and by that time the UI is blocked. I created an example jsfiddle where you can try it: https://jsfiddle.net/gscLb526/

Is there any way to speed up this process, or I'm doing something wrong?

[gberaudo]

Your code looks correct. Have you tried instanciating 1000 labels in Cesium to see if there is a difference in performance?