Raycasting an instantly moved collider - unity3d

Question

I need to move some transforms with attached colliders to a specific position, then check if one of them is hit by raycast.
I've done that the naive way (pseudo code) :
foreach(object in objects){
actual_position = object.transform.position
object.transform.position = object.new_position
}
if(Physics.Raycast(...)) objectHit();
// Then I revert each of them them back to their actual_position
After testing multiple times with the same context (same positions between tests for each objects), the raycast sometimes miss, sometimes not (~50/50).
Done a bit of research and found that in the Raycast doc page :
If you move colliders from scripting or by animation, there needs to
be at least one FixedUpdate executed so that the physics library can
update its data structures, before a Raycast will hit the collider at
it's new position.
So I calmed my anger and started looking for a solution.
This thread has a way using a coroutine to wait the next tick :
Raycast doesn't work properly
I'm affraid it won't work for me, as I need the objects to get back to their real position instantly.
This process can happen multiple times per frame (each time a player fire his weapon)
Is there a way to force the colliders update ?
If not... should I make my own raycasts and colliders ? :(
Thanks

Answer 1

Another workaround is to deactivate and activate Gameobject (attached collider) immediately. In this case collider position will be updated in single frame.
Another solution is
Physics.autoSyncTransforms and Physics.SyncTransform

Answer 2

Maybe you can try this out (adding to your pseudo-code):
foreach(object in objects)
{
actual_position = object.transform.position;
object.transform.position = object.new_position;
StartCoroutine(CheckToRevertOnNextFixedUpdate(object, actual_position));
}
IEnumerator CheckToRevertOnNextFixedUpdate(object, actual_position)
{
yield return new WaitForFixedUpdate();
if(Physics.Raycast(...)) objectHit();
// Then I revert each of them them back to their actual_position
}
Essentially this delays your check to the next FixedUpdate() for each object - and reverts each of them if needed. I hope this is not overcomplicated, since you only add a few lines of code.
I'm also assuming that moving the object's position for 1 FixedUpdate() frame would not have a visual effect of the the object teleporting to the new position and back. However, you can always move the collider only, and then move the rest of the transform there after the FixedUpdate().

Answer 3

Performance-wise, the best method seems to be updating the RigidBody.position:
private Rigidbody Rigidbody;
void Start()
{
Rigidbody = gameObject.GetComponent<Rigidbody>();
}
void Upate()
{
//.... your code
Rigidbody.position = newPosition;
}
Much faster then deactivate/activate or Physics.SyncTransform().