Achieving faster than 100x realtime speeds

Hello,

I'm working with a physics simulation in Unity that is going to be used in a machine learning project. Unfortunately, in order to use it with machine learning, I need to iterate the simulation at speeds around 1000x realtime. Using Time.timescale, I'm locked to a maximum of 100x.

I've been trying to think of a way to cheat this issue - perhaps scale my physics calculations to assume a larger fixedupdate rate than actually occurs. However, it appears the physics calculations only operate in an instantaneous frame, independent of the fixed update step, which appears to make that sort of calculation inaccessible to me.

Is there any direction on how to implement physics to control the speed without relying entirely on Time.timescale?

 

I am also interested in this, the only solution I found from a couple years ago was to use a deterministic physics system such as bullet physics. https://www.assetstore.unity3d.com/en/#!/content/62991