Is efficient to call a function inside another function?

Let's say I have multiple functions like so:

local function1 = function()
	local printMessage = "Hi! This is function 1"

	return printMessage
end

local function2 = function()
	local printMessage = function1()

	print (printMessage)
end

Would this be just as efficient as doing:

local function1 = function()
	local printMessage = "Hi! This is just a function!"

	print (printMessage)
end

I'm trying to keep my code as clean, but as efficient as possible. Thanks in advance for any advice.

edit:

I know you're probably thinking, "why not just do one function?"

This is just an oversimplified version of what I'm doing using print as an example.