Does Unity recycle GetInstanceID in the same session?

[yosimba2000]

For example, I spawn Gameobject A and it has InstanceID 123.

I then destroy Gameobject A, and spawn Gameobject B.

Is it possible for Gameobject B to have instanceID 123 now that Gameobject A no longer exists?

[Kurt-Dekker]

I would start with the docs. Anything not promised should not be relied upon.

[yosimba2000]

The docs only mention that the InstanceIDs are guaranteed to be unique, nothing about if they are recycled when a GO is destroyed. Guess it’s safer to assume they will be recycled, huh

[Tautvydas-Zilys]

It’s implemented as an ever increasing unsigned integer, so they shouldn’t be recycled, unless you run your game long enough that it overflows and starts from 0 again (which is possible on 32-bit platforms, but unlikely on 64-bit platforms).

[yosimba2000]

@Tautvydas-Zilys

It’s implemented as an ever increasing unsigned integer, so they shouldn’t be recycled, unless you run your game long enough that it overflows and starts from 0 again (which is possible on 32-bit platforms, but unlikely on 64-bit platforms).

That’s exactly what I was hoping for, thanks for confirming!