The problem is more in how you combine that with something else. Consider, you have two "routines", one for "pick up ammo and take a shot" and one for "evade a

The problem is more in how you combine that with something else. Consider, you have two "routines", one for "pick up ammo and take a shot" and one for "evade attack". Without a "yield", then your recovery time after an action is the longest chain of actions you have encoded. With the yield, it is the longest of a particular "command" that you have.