Unity 3D: Adding rigidbody to sphere crashes frame rate

Question

There is a strange issue happening in Unity 3D: I have an empty scene, then I add new sphere game object, press run, the ball stays stationary. I can see in the Game window that FPS are ok.

Then I add Rigidbody component to the same sphere and press play. The sphere starts to fall down as it should, but the frame rate drops dramatically, that is below 3 FPS.

I've updated the Nvida drivers, I also tried this in both 32 and 64 bit newest Unity versions.

It seems that there something wrong with the physics calculations. Does anyone experienced similar issues? Any tips on how could I debug this issue further?

in my unity its fine. 5.4 here i have the same fps on both cases and are near 80. — cjf93
That's really weird behaviour - if you open the Unity Profiler, it might give you a little more insight into what exactly is causing the drop in performance. Run it before and after you add the Rigidbody, and see what the graphs tell you. — Serlite
Is it possible that your scene is full of other rigidbodies that aren't set to kinematic? it's possible that since you've introduced a moving object, it has to check all the other rigid bodies in your scene for collisions. Just a thought. — Adam B

Akshay Patel Akshay Patel · Accepted Answer · 2016-09-30T04:26:47

Some times Vsync can act as the FPS dropper.

so check Edit>>Project Settings>>Quality>>V Sync Count

Set V Sync Count it to Don't Sync. it should increase your FPS.

if it does not help than you might have some script that is acting as weird. so try Profiler .Go to Windows>>Profiler .

and run your game see what is taking your highest CPU.

Unity 3D: Adding rigidbody to sphere crashes frame rate

1 Answers