Instance or getComponent?

Instance or getComponent
which one is better for calling?

I wanna know which call is more better or have any better way to call?

 

What is Instance?

 

it a kind of singleton

 

Assuming this has to do with your previous post, use GetComponent or SendMessage:

http://docs.unity3d.com/ScriptReference/Component.SendMessage.html

 

i will send alot of message everytime,
is it ok for that?

 

yeah, don't see why not.

 

I'm pretty certain that using SendMessage() a lot can have a serious impact on performance and is best avoided.

I would suggest using GetComponent() in the Start() function to inialise a local variable which can then be used to reference the object throughout the rest of the script. You could also use public static variables, which in general is less desirable, but under the right circumstances can be quite useful.