Category: Action Script

package  
{
  import flash.display.Sprite;
  import flash.events.Event;
  import flash.text.TextField;
  import flash.text.TextFormat;
  import flash.utils.getTimer;
 
  /**
   * Perform iteration tests on vector and array of int values.
   *
   * @ultraforce
   * J. Munnik
   * www.ultraforce.com
   * Copyright (c) 2011 by Ultra Force Development
   * 
   * version 1
   * - initial version
   * 
   */
  public class BracketOperatorTest extends Sprite
  {
    ///
    /// CONST
    ///
 
    /**
     * Number of values to fill array and vector with
     */
    public static const COUNT: int = 10000000;
 
    ///
    /// PRIVATE VARS
    ///
 
    /**
     * Text field for output.
     */
    private var m_log: TextField;
 
    /**
     * Contains test data
     */
    private var m_intVector: Vector.;
    private var m_intArray: Array;
 
    /**
     * Current test
     */
    private var m_testIndex:Number;
 
    ///
    /// PUBLIC METHODS
    ///
 
    /**
     * Constructor
     */
    public function BracketOperatorTest()
    {
      super();
      if (this.stage)
        this.onAddedToStage();
      else 
        this.addEventListener(Event.ADDED_TO_STAGE, onAddedToStage);
    }
 
    ///
    /// PRIVATE METHODS
    ///
 
    /**
     * Add textline(s) to log window.
     * 
     * @param	aText: text to log
     */
    private function log(aText: *): void
    {
      this.m_log.appendText(aText.toString());
      trace(aText);
    }
 
    /**
     * Create test data.
     */
    private function initTest(): void
    {
      // build test lists
      this.m_intVector = new Vector.(COUNT, true);
      this.m_intArray = new Array(COUNT);
      // fill with data
      for (var index: int = 0; index < COUNT; index++)
      {
        var value: int = Math.floor(Math.random() * COUNT);
        this.m_intArray[index] = value;
        this.m_intVector[index] = value;
      }
      // reset test index
      this.m_testIndex = 0;
    }
 
    /**
     * Run various tests on an array of int and a vector of int 
     * (same number of elements and same values at every index)
     * 
     * @return true if there is another test, false if there are no more tests
     */
    private function runTest(): Boolean
    {
      // perform tests
      var time: int = getTimer();
      // perform certain test and increase test index for next call
      switch(this.m_testIndex++)
      {
        case 0:
          this.log(this.addVectorWithFor(this.m_intVector));
          this.log(', Vector: addVectorWithFor: ' + (getTimer() - time) + 'ms\n');
          break;
        case 1:
          this.log(this.addVectorWithForCached(this.m_intVector));
          this.log(', Vector: addVectorWithForCached: ' + (getTimer() - time) + 'ms\n');
          break;
        case 2:
          this.log(this.addVectorWithForReverse(this.m_intVector));
          this.log(', Vector: addVectorWithForReverse: ' + (getTimer() - time) + 'ms\n');
          break;
        case 3:
          this.log(this.addVectorWithForEach(this.m_intVector));
          this.log(', Vector: addVectorWithForEach: ' + (getTimer() - time) + 'ms\n');
          break;
        case 4:
          this.log(this.addGeneralWithFor(this.m_intVector));
          this.log(', Vector: addGeneralWithFor: ' + (getTimer() - time) + 'ms\n');
          break;
        case 5:
          this.log(this.addGeneralWithForCached(this.m_intVector));
          this.log(', Vector: addGeneralWithForCached: ' + (getTimer() - time) + 'ms\n');
          break;
        case 6:
          this.log(this.addGeneralWithForReverse(this.m_intVector));
          this.log(', Vector: addGeneralWithForReverse: ' + (getTimer() - time) + 'ms\n');
          break;
        case 7:
          this.log(this.addGeneralWithForEach(this.m_intVector));
          this.log(', Vector: addGeneralWithForEach: ' + (getTimer() - time) + 'ms\n');
          break;
        case 8:
          this.log(this.addArrayWithFor(this.m_intArray));
          this.log(', Array: addArrayWithFor: ' + (getTimer() - time) + 'ms\n');
          break;
        case 9:
          this.log(this.addArrayWithForCached(this.m_intArray));
          this.log(', Array: addArrayWithForCached: ' + (getTimer() - time) + 'ms\n');
          break;
        case 10:
          this.log(this.addArrayWithForReverse(this.m_intArray));
          this.log(', Array: addArrayWithForReverse: ' + (getTimer() - time) + 'ms\n');
          break;
        case 11:
          this.log(this.addArrayWithForEach(this.m_intArray));
          this.log(', Array: addArrayWithForEach: ' + (getTimer() - time) + 'ms\n');
          break;
        case 12:
          this.log(this.addGeneralWithFor(this.m_intArray));
          this.log(', Array: addGeneralWithFor: ' + (getTimer() - time) + 'ms\n');
          break;
        case 13:
          this.log(this.addGeneralWithForCached(this.m_intArray));
          this.log(', Array: addGeneralWithForCached: ' + (getTimer() - time) + 'ms\n');
          break;
        case 14:
          this.log(this.addGeneralWithForReverse(this.m_intArray));
          this.log(', Array: addGeneralWithForReverse: ' + (getTimer() - time) + 'ms\n');
          break;
        case 15:
          this.log(this.addGeneralWithForEach(this.m_intArray));
          this.log(', Array: addGeneralWithForEach: ' + (getTimer() - time) + 'ms\n');
          break;
        default:
          this.log('-- done');
          // no more tests available
          return false;
      }
      // more tests available
      return true;
    }
 
    /**
     * Go trough array starting at index 0 to last value.
     * 
     * @param	anArray: array to go trough
     * 
     * @return sum of all int values
     */
    private function addArrayWithFor(anArray: Array): int
    {
      var result: int = 0;
      for (var index: int = 0; index < anArray.length; index++)
      {
        result += anArray[index];
      }
      return result
    }
 
    /**
     * Go trough array starting at index 0 to last value.
     * Cache the length of the list in a local variable.
     * 
     * @param	anArray: array to go trough
     * 
     * @return sum of all int values
     */
    private function addArrayWithForCached(anArray: Array): int
    {
      var result: int = 0;
      var count: int = anArray.length;
      for (var index: int = 0; index < count; index++)       {         result += anArray[index];       }       return result     }          /**      * Go trough array starting at last value and ending at first value (at index 0).      *       * @param	anArray: array to go trough      *       * @return sum of all int values      */     private function addArrayWithForReverse(anArray: Array): int     {       var result: int = 0;       for (var index: int = anArray.length - 1; index >= 0; index--)
      {
        result += anArray[index];
      }
      return result
    }
 
    /**
     * Go trough array starting using for each statement.
     * 
     * @param	anArray: array to go trough
     * 
     * @return sum of all int values
     */
    private function addArrayWithForEach(anArray: Array): int
    {
      var result: int = 0;
      for each(var value: int in anArray) result += value;
      return result
    }
 
    /**
     * Go trough a general value starting with the value at 
     * the first index and ending with the value at the last index. 
     * 
     * Assume the list has a length property and use the [] operator to 
     * access the values inside.
     * 
     * @param	anArray: general value to go trough
     * 
     * @return sum of all int values
     */
    private function addGeneralWithFor(anArray: *): int
    {
      var result: int = 0;
      for (var index: int = 0; index < anArray.length; index++)
      {
        result += anArray[index];
      }
      return result
    }
 
    /**
     * Go trough a general value starting with the value at 
     * the first index and ending with the value at the last index. 
     * 
     * Assume the list has a length property and use the [] operator to 
     * access the values inside.
     * 
     * Cache the length of the list in a local variable.
     * 
     * @param	anArray: general value to go trough
     * 
     * @return sum of all int values
     */
    private function addGeneralWithForCached(anArray: *): int
    {
      var result: int = 0;
      var count: int = anArray.length;
      for (var index: int = 0; index < count; index++)       {         result += anArray[index];       }       return result     }          /**      * Go trough a general value starting with the value at the last       * index and ending with the value at the first index.       *       * Assume the list has a length property and       * use the [] operator to access the values inside.      *       * @param	anArray: general value to go trough      *       * @return sum of all int values      */     private function addGeneralWithForReverse(anArray: *): int     {       var result: int = 0;       for (var index: int = anArray.length - 1; index >= 0; index--)
      {
        result += anArray[index];
      }
      return result
    }
 
    /**
     * Use for each statement on a general value.
     * 
     * @param	anArray: general value to go trough
     * 
     * @return sum of all int values
     */
    private function addGeneralWithForEach(anArray: *): int
    {
      var result: int = 0;
      for each(var value: int in anArray) result += value;
      return result
    }
 
    /**
     * Go trough a int vector starting with the value at the first 
     * index and ending with the value at the last index. 
     * 
     * @param	anArray: int vector to go trough
     * 
     * @return sum of all int values
     */
    private function addVectorWithFor(anArray: Vector.): int
    {
      var result: int = 0;
      for (var index: int = 0; index < anArray.length; index++)
      {
        result += anArray[index];
      }
      return result
    }
 
    /**
     * Go trough a int vector starting with the value at the first 
     * index and ending with the value at the last index. 
     * Cache the length of the list in a local variable.
     * 
     * @param	anArray: int vector to go trough
     * 
     * @return sum of all int values
     */
    private function addVectorWithForCached(anArray: Vector.): int
    {
      var result: int = 0;
      var count: int = anArray.length;
      for (var index: int = 0; index < count; index++)
      {
        result += anArray[index];
      }
      return result
    }
 
    /**
     * Go trough a int vector starting with the value at the last 
     * index and ending with the value at the first index. 
     * 
     * @param	anArray: int vector to go trough
     * 
     * @return sum of all int values
     */
    private function addVectorWithForReverse(anArray: Vector.): int
    {
      var result: int = 0;
      for (var index: int = anArray.length - 1; index >= 0; index--)
      {
        result += anArray[index];
      }
      return result
    }
 
    /**
     * Go trough a int vector using for each statement.
     * 
     * @param	anArray: int vector to go trough
     * 
     * @return sum of all int values
     */
    private function addVectorWithForEach(anArray: Vector.): int
    {
      var result: int = 0;
      for each(var value: int in anArray) result += value;
      return result
    }
 
    ///
    /// EVENTS
    ///
 
    /**
     * Instance is added to stage; run it.
     * 
     * @param	anEvent: event object (default is null)
     */
    private function onAddedToStage(anEvent: Event = null): void 
    {
      this.removeEventListener(Event.ADDED_TO_STAGE, onAddedToStage);
      this.m_log = new TextField();
      this.m_log.width = this.stage.stageWidth;
      this.m_log.height = this.stage.stageHeight;
      this.m_log.multiline = true;
      this.m_log.wordWrap = true;
      this.m_log.setTextFormat(
        this.m_log.defaultTextFormat = new TextFormat('_sans')
      );
      this.addChild(this.m_log);
      this.initTest();
      this.addEventListener(Event.ENTER_FRAME, onEnterFrame);
    }
 
    /**
     * Run a test. Stop listening to events if tests have finished.
     * 
     * @param	anEvent: event
     */
    private function onEnterFrame(anEvent: Event): void 
    {
      if (!this.runTest()) 
        this.removeEventListener(Event.ENTER_FRAME, onEnterFrame);
    }
  }
}