Obtaining Components using the fastest method

There are several variations of the GetComponent() method, and it becomes prudent to call the fastest possible version of this method. The three overloads available are GetComponent(string), GetComponent<T>(), and GetComponent(typeof(T)). It turns out that the fastest version depends on which version of Unity we are running.

In Unity 4, the GetComponent(typeof(T)) method is the fastest of the available options by a reasonable margin. Let's prove this with some simple testing:

int numTests = 1000000;
TestComponent test;

using (new CustomTimer("GetComponent(string)", numTests)) {
  for (var i = 0; i < numTests; ++i) {
    test = (TestComponent)GetComponent("TestComponent");
  }
}

using (new CustomTimer("GetComponent<ComponentName>", numTests)) {
  for (var i = 0; i < numTests; ++i) {
    test = GetComponent<TestComponent>();
  }
}

using (new CustomTimer("GetComponent(typeof(ComponentName...