Did you know you can label loops in ActionScript 3? Yes, you can! I got inspired by latest tweets referencing source code in image. Lets do some small experiments… Label all of them:
var a:uint, b:uint = 0;
loopA:for(a = 0; a < 10; a++)
loopB:while(b++ < 100)
loopC:for each(var c:uint in [0,1,2,3])
break loopB;
trace(a, b, c); // traces "10 10 0"
Have you ever been curious about performance (benchmark) tests in ActionScript 3? Here are some results gathered from gskinner blog.
Performance testing on loops (read more).
method............................................................. ms
for (var i:uint=0; i<length; i++) 40
for (var i:uint=length; i>0; i--) 40
var i:uint = 0; while (i < length) i++; 40
var i:uint = length; while (--i) 52
var i:uint = 0; do {} while (++i < length); 68
var i:uint = length-1; do {} while (i--); 68
for (var b:* in arr) 224
for each (var b:Boolean in arr) 216
for each (var b:* in arr) 200
for each (var b:* in arr) var c:Boolean = b as Boolean; 686
arr.forEach(arrForEachF) 1446
Performance testing on operations with Number, int, uint. (read more)
Assignment (a:TYPE = 0) ......... min - max (ms) int: 24 - 45 Number: 24 - 36 uint: 25 - 37
Assignment (a:TYPE = 0.5) ....... min - max (ms) int: 56 - 83 Number: 26 - 43 uint: 57 - 92
Division (a:TYPE = i/2) ......... min - max (ms) int: 60 - 105 Number: 34 - 64 uint: 184 - 278
Multiplication (a:TYPE = i*2) ... min - max (ms) int: 78 - 129 Number: 39 - 64 uint: 207 - 280
Addition (a:TYPE = i+2) ......... min - max (ms) int: 31 - 49 Number: 44 - 55 uint: 85 - 113
Bitshift (a:TYPE = i<<1) ........ min - max (ms) int: 31 - 63 Number: 61 - 114 uint: 71 - 130
