It may be FXC that’s taking time (the shader compiler used by Chrome to compile shaders on Windows). You can try switching the graphics backend to “OpenGL” to see if that’s where the problem lies:
- browser chrome://flags
- find angle
- change the value to “OpenGL”:
In any case, I’m afraid there’s nothing we can do on our side if the problem really is with the browser-side compilation (upgrading to a newer version of Babylon won’t help in this respect).