How to calling many Functions at once?

Is it a good idea to call many functions at once?

If Clicked

Call Function1

Call Function2

Call Function3

Call Function4

Does this complete Function1 before it calls Function2 or are all of them called as quick as possible, where Function2 could finish before Function1 if it were a shorter Function?

It is working properly on my computer, but I am not sure how it would work on a weak device.

Should I have 'Wait 0 Seconds' between each function to add a tick between each Function call?

Thanks, in advance.

C2 always runs in order. It's Wait that runs things out of order. You should be fine.

I knew it was like that for events and conditions, I wasn't 100% sure on Functions. Thank you