Testing environment
You will find many tables that covers execution time. All this are done on machine:
Comp1
Intel(R) Core(TM) Duo CPU E8400 @ 3000Hz 3.00 GHz, 3 .00 GB of RAM with Windows XP Professional SP3, Flash player version 9.0.115.0, NOT DEBUG PLAYER
All the tests were not done using the debug player and they were not running in debug mode which is very important in specific cases. Each test case was running ten times. The result shown is always the average execution time of the ten runs. This way two tests do not conflict with the garbage collection and each test is just responsible for its own memory usage. Before each run there is a ten seconds delay in order to not conflict with the Flash player starting procedure.
From result that using uint and int in loop did not make time difference. But I suggest you use where you can int instead of uint. You can find interesting article about (int vs uint vs Number) this topics here:
Avoid ints in ActionScript, by Sho Kuwamoto, date: June 15th, 2006
Types in AS3: ints not so fast, uints slow!, by Grant Skinner, date: June 15th, 2006
Use the Correct Type for the Job, by Think, date: June 20th, 2006
Optimization: When to do it., by Keith Peters, date: June 21st, 2006
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| package {
import flash.display.Sprite;
import flash.text.TextField;
import flash.utils.getTimer;
import flash.utils.setTimeout;
import flash.system.Capabilities;
[SWF(frameRate = '255')]
public class TestCase extends Sprite {
private static const n: int = 10000000;
public function TestCase() {
setTimeout(runTest, 10000);
}
private function runTest(): void {
var a: Number = 0;
for ( var i: int = 0; i < 10; ++i ) a += test06();
a /= 10;
showResults(a);
}
private function showResults(result_:Number):void {
var result_txt:TextField = new TextField();
result_txt.x = result_txt.y = 10;
result_txt.width = 300;
result_txt.text = "Iterations: [10^" + (String(n).length - 1) + "], int[ms]: " + result_ +"\nisDebugger: " + Capabilities.isDebugger + "\nversion: " + Capabilities.version;
addChild(result_txt);
}
// 1. Iterations: [10^5], int[ms]: 4.7
// 2. Iterations: [10^5], int[ms]: 5
// 3. Iterations: [10^5], int[ms]: 4.4
// 4. Iterations: [10^5], int[ms]: 4.7
private function test00(): int {
var startTime:int = getTimer();
//test start
for (var i:int = 0; i < n; ++i ) {
var a: Number = ( 1 as Number );
}
//test end
return (getTimer() - startTime);
}
// 1. Iterations: [10^5], int[ms]: 5.4
// 2. Iterations: [10^5], int[ms]: 5.2
// 3. Iterations: [10^5], int[ms]: 5.2
// 4. Iterations: [10^5], int[ms]: 5.4
private function test01(): int {
var startTime:int = getTimer();
//test start
for (var i:uint = 0; i < n; ++i ) {
var a: Number = ( 1 as Number );
}
//test end
return (getTimer() - startTime);
}
// 1. Iterations: [10^7], int[ms]: 32.9
// 2. Iterations: [10^7], int[ms]: 33.1
// 3. Iterations: [10^7], int[ms]: 32.9
// 4. Iterations: [10^7], int[ms]: 33.4
private function test03(): int {
var startTime:int = getTimer();
//test start
var k:uint;
for (var i:int = 0; i < n; ++i ) {
k++;
}
//test end
return (getTimer() - startTime);
}
// 1. Iterations: [10^7], int[ms]: 33
// 2. Iterations: [10^7], int[ms]: 32.8
// 3. Iterations: [10^7], int[ms]: 33
// 4. Iterations: [10^7], int[ms]: 32.8
private function test04(): int {
var startTime:int = getTimer();
//test start
var k:int;
for (var i:int = 0; i < n; ++i ) {
k++;
}
//test end
return (getTimer() - startTime);
}
// 1. Iterations: [10^7], int[ms]: 91.8
// 2. Iterations: [10^7], int[ms]: 91.8
// 3. Iterations: [10^7], int[ms]: 91.7
// 4. Iterations: [10^7], int[ms]: 91.8
private function test05(): int {
var startTime:int = getTimer();
//test start
var k:int;
for (var i:int = 0; i < n; ++i ) {
k = (i + 15) / 7;
}
//test end
return (getTimer() - startTime);
}
// 1. Iterations: [10^7], int[ms]: 91.8
// 2. Iterations: [10^7], int[ms]: 92.3
// 3. Iterations: [10^7], int[ms]: 92.2
// 4. Iterations: [10^7], int[ms]: 92.2
private function test06(): int {
var startTime:int = getTimer();
//test start
var k:uint;
for (var i:int = 0; i < n; ++i ) {
k = (i + 15) / 7;
}
//test end
return (getTimer() - startTime);
}
}
} |
