Which is faster?

02-03-2009, 08:36 PM

Even if it is barely, I've always wanted to know what is faster:

JASS:

                        set d = SquareRoot( ( x - .x ) * ( x - .x ) + ( y - .y ) * ( y - .y ) + ( z - .z ) * ( z - .z ) )
                        if d <= a + b then

JASS:

                        set d = ( x - .x ) * ( x - .x ) + ( y - .y ) * ( y - .y ) + ( z - .z ) * ( z - .z )
                        if d <= ( a + b ) * ( a + b ) then

JASS:

                        set d = ( x - .x ) * ( x - .x ) + ( y - .y ) * ( y - .y ) + ( z - .z ) * ( z - .z )
                        set r = a + b
                        if d <= r * r then

02-04-2009, 12:51 AM	#2
Jazradel	Probably example 3.

02-04-2009, 01:04 AM	#3
Anitarf	I'd say the second example, assuming that the local variable r from the third example doesn't need to be allocated in the second one. Then again, you could use a global, but the speed difference is not significant enough to tolerate such uglyness.