Bug Shurkien particles and "Application.UpdateScene"

Hello,
This terrible bug continues since Unity 5.5.
Any changes of particle system causes the editor to freeze for a few seconds.
1k particles ~5 seconds
5k particles ~8 seconds
10k particles ~20 seconds
20k particles ~1 minute.

Impossible to work with a particle system when any change requires waiting 100500 seconds.
Any ideas?


Looks like unity update each module per particle?
For example, I have "noise", "shape" and "velocity" module. 20k particles * 3 active modules = 60k updates in the profiler. WTF?

the only way to speed up the particles is to turn off playback -> change the parameter -> turn on playback

 

Is this maybe due to „warmup“?
Not sure if you can do that with Inspector, I only remember that as a particlesystem flag, probably in the Start method.

 

I found what cause this problem.
If this toggle is checked then I have this bug.

I think unity must disable it by default.