Shifting versus Mutliplying

[TerryRitchie]

Ok, I reworked the code and multiplying is definitely faster. Thanks for the insight DSMan195276.

Code: (Select All)

DIM x AS INTEGER
DIM y AS INTEGER
DIM i AS LONG
DIM t AS DOUBLE
DIM t1 AS DOUBLE
DIM t2 AS DOUBLE

x = 4
DO
    i = 0
    t = TIMER(.001)
    DO
        y = x * 4
        i = i + 1
    LOOP UNTIL i = 1000000000 ' a billion times
    t1 = TIMER(.001) - t

    i = 0
    t = TIMER(.001)
    DO
        y = _SHL(x, 2)
        i = i + 1
    LOOP UNTIL i = 1000000000
    t2 = TIMER(.001) - t

    BEEP
    CLS
    PRINT
    PRINT USING " #.### --> Multiplying"; t1
    PRINT USING " #.### --> Shiting left"; t2

LOOP