Vehicle in builded game moves much slower, than in editor

I'm doing 2D car game. When player presses button, car moves right. The problem is that it always runs good in editor, but in builded PC/Mac versions car moves much slower. But sometimes I reload level and it moves good. But then I reload level and it drives slow again. I've tried to move car with addForce, addForceAtPosition and velocity. It is all the same result. Is there problem with input manager? There are other gameObject with script
void Update () {
if (Input.GetKey(KeyCode.D))
{
car.GetComponent<carBeh>().goRight();
}
}

Any ideas what's the problem?

 

Try putting your code into the FixedUpdate() function rather than the Update() function. Update can have varying timing depending on frame-rate whereas fixedupdate will be consistently timed and should thus be consistent across your build platforms.

 

First, do all physics related stuff (like moving) in the fixed update function as Vorpal Silence suggests. Also always keep in mind, that on performane peeks the fixed update won't be every fixed time slot, so multiply Time.fixedDeltaTime to every variable necessary. So for example:

Code (CSharp):

1. // Don't do it like this
2. transform.position += transform.forward * 0.1f;
3.  
4. // Do it like this
5. transform.position += transform.forward * 6 * Time.fixedDeltaTime;

For rigidbody.AddForce it is not necessary by the way.