Different type of loop

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Malice

Ive no idea why it's so. It MIGHT be possible that different CPU's (or manufacturers of CPU's could give different results, for the sake of informaiton, I am running an AMD X2 64 5600+ chip

My test was done with the following:

ClearWorld
SetBuffer FrontBuffer()

Global FN1#=0
Global FN2#=0
Global FN3#=0

Global WW1#=0
Global WW2#=0
Global WW3#=0

Global RU1#=0
Global RU2#=0
Global RU3#=0

x=0

ClsColor 0,0,0
Cls

ClsColor 255,255,255
Global timer%

Delay 1000
Cls

timer%=MilliSecs()
For x=0 To 33554432
Next
stoptime=MilliSecs()
FN1=stoptime-timer

ClsColor 0,0,0
Cls

ClsColor 255,255,255
x=0
Delay 1000
Cls

timer%=MilliSecs()
While x<=33554432
	x=x+1
Wend
stoptime=MilliSecs()

WW1=stoptime-timer

ClsColor 0,0,0
Cls

ClsColor 255,255,255
x=0
Delay 1000
Cls

timer%=MilliSecs()
Repeat 
	x=x+1
Until x>33554432
stoptime=MilliSecs()

RU1=stoptime-timer

ClsColor 0,0,0
Cls

ClsColor 255,255,255
x=0
Delay 1000
Cls


timer%=MilliSecs()
For x=0 To 33554432
Next
stoptime=MilliSecs()
FN2=stoptime-timer

ClsColor 0,0,0
Cls

ClsColor 255,255,255
x=0
Delay 1000
Cls

timer%=MilliSecs()
While x<=33554432
	x=x+1
Wend
stoptime=MilliSecs()

WW2=stoptime-timer

ClsColor 0,0,0
Cls

ClsColor 255,255,255
x=0
Delay 1000
Cls

timer%=MilliSecs()
Repeat 
	x=x+1
Until x>33554432
stoptime=MilliSecs()

RU2=stoptime-timer

ClsColor 0,0,0
Cls

ClsColor 255,255,255
x=0
Delay 1000
Cls


timer%=MilliSecs()
For x=0 To 33554432
Next
stoptime=MilliSecs()
FN3=stoptime-timer

ClsColor 0,0,0
Cls

ClsColor 255,255,255
x=0
Delay 1000
Cls

timer%=MilliSecs()
While x<=33554432
	x=x+1
Wend
stoptime=MilliSecs()

WW3=stoptime-timer

ClsColor 0,0,0
Cls

ClsColor 255,255,255
x=0
Delay 1000
Cls

timer%=MilliSecs()
Repeat 
	x=x+1
Until x>33554432
stoptime=MilliSecs()

RU3=stoptime-timer



ClsColor 0,0,0
Color 255,255,255
Cls

Print "Mean For/Next     : "+Int((FN1#+FN2#+FN3#)/3.0)+"ms"
Print "Mean While/Wend: "+Int((WW1#+WW2#+WW3#)/3.0)+"ms"
Print "Mean Repeat/Until: "+Int((RU1#+RU2#+RU3#)/3.0)+"ms"

Strangely, though.. I have just run the program again a few times, and NOW it seems to indicate ForNext is quicker :S

oops!