Noob Method Question:- Ignoring Return

There's a slight difference in time over 10000s of iterations between capturing the return and letting it drop.
Not returning anything gives same time as returning but not capturing.

Type ttest
	Field x
	Method set(x)
		x = x
'		Return Self
	End Method
End Type
mynew:TTest = New ttest
t1=MilliSecs()
For x = 0 To 10000000
mynew.set(6)
Next 
t2=MilliSecs()
'For x = 0 To 10000000
'myold:TTest = mynew.set(6)
'Next
't3 = MilliSecs()
Print (t2-t1) '+ " " + (t3-t2)