2D game - how to optimize performance for audio when you do not need 3D audio?

Currently, I use t$$anonymous$$s code to play 2d sound (just play a 3d sound at the camera, just because I don't need a 3d sound in t$$anonymous$$s case)

 public AudioClip pGameOver = null;
 //...
 AudioSource.PlayClipAtPoint(pGameOver, Camera.main.transform.position);

I don't know if it's better (in performance favor) to use the static function AudioSource.PlayClipAtPoint() instead of creating an AudioSource to call its Play() function. Obviously, in the first option, I can't play 2d sound (I t$$anonymous$$nk), but if I use the second option I can play 2d sound. But I t$$anonymous$$nk the first option is more safe because I can play multiple sounds.

So how to optimize optimize performance for audio when I don't need 3D audio effect? All I need is playing a wav file as it is.

My target platform is Android.