MathPerf.java

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 * Copyright (c) 2013, Daniel Murphy
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 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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/**
 * Created at 7:09:57 PM Jan 18, 2011
 */
package org.jbox2d.testbed.perf;

import org.jbox2d.common.MathUtils;
import org.jbox2d.profile.BasicPerformanceTest;

// Results from Mac 1/19/11
//Test Name               Milliseconds Avg
//Sin                              86.2132
//SinLUT                           26.7498
//Pow                              74.5660
//FastPow                          20.9268
//Max                              11.6579
//FastMax                          11.6045
//Floor                             0.0593
//fastFloor                         0.0216
//aTan2                            20.1040
//fastATan2                        18.2086
//ceil                              0.0348
//fastCeil                          0.0215

// Results from Windows 1/19/11
//Test Name               Milliseconds Avg
//Sin                             254.5806
//SinLUT                           57.6727
//Pow                             125.5473
//FastPow                          25.7931
//Max                              16.9723
//FastMax                          16.9692
//Floor                             0.0659
//fastFloor                         0.0206
//aTan2                            31.6952
//fastATan2                        22.9149
//ceil                              0.0476
//fastCeil                          0.0238

/**
 * @author Daniel Murphy
 */
public class MathPerf extends BasicPerformanceTest {

  public static int INNER_ITERS = 5000;
  public static int OUTER_ITERS = 5000;

  String[] tests = new String[] {"Sin", "SinLUT", "Pow", "FastPow", "Max", "FastMax", "Floor",
      "fastFloor", "aTan2", "fastATan2", "ceil", "fastCeil"};

  public float aStore = 0;

  public MathPerf() {
    super(12, OUTER_ITERS, INNER_ITERS);
  }

  @Override
  public void step(int argNum) {
    float random = MathUtils.randomFloat(-Float.MAX_VALUE / 3, Float.MAX_VALUE / 3);
    switch (argNum) {
      case 0:
        runSinTest(random);
        break;
      case 1:
        runSinLUTTest(random);
        break;
      case 2:
        runPowTest(random);
        break;
      case 3:
        runFastPowTest(random);
        break;
      case 4:
        runMaxTest(random);
        break;
      case 5:
        runFastMaxTest(random);
        break;
      case 6:
        runFloorTest(random);
        break;
      case 7:
        runFastFloorTest(random);
        break;
      case 8:
        runAtan2Test(random);
        break;
      case 9:
        runFastAtan2Test(random);
        break;
      case 10:
        runCeilTest(random);
        break;
      case 11:
        runFastCeilTest(random);
        break;
    }
  }

  public void runSinTest(float argRandom) {
    float a = (float) StrictMath.sin(argRandom);
    aStore += a;
  }

  public void runSinLUTTest(float argRandom) {
    float a = MathUtils.sinLUT(argRandom);
    aStore += a;
  }

  public void runPowTest(float argRandom) {
    float a = (float) StrictMath.pow(argRandom, MathUtils.randomFloat(-100, 100));
    aStore += a;
  }

  public void runFastPowTest(float argRandom) {
    float a = MathUtils.fastPow(argRandom, MathUtils.randomFloat(-100, 100));
    aStore += a;
  }

  public void runMaxTest(float argRandom) {
    float a = StrictMath.max(argRandom, MathUtils.randomFloat(-100, 100));
    aStore += a;
  }

  public void runFastMaxTest(float argRandom) {
    float a = MathUtils.max(argRandom, MathUtils.randomFloat(-100, 100));
    aStore += a;
  }

  public void runFloorTest(float argRandom) {
    float a = (float) StrictMath.floor(argRandom);
    aStore += a;
  }

  public void runFastFloorTest(float argRandom) {
    float a = MathUtils.fastFloor(argRandom);
    aStore += a;
  }

  public void runAtan2Test(float argRandom) {
    float a = (float) StrictMath.atan2(argRandom, MathUtils.randomFloat(-10000, 10000));
    aStore += a;
  }

  public void runFastAtan2Test(float argRandom) {
    float a = MathUtils.fastAtan2(argRandom, MathUtils.randomFloat(-10000, 10000));
    aStore += a;
  }

  public void runCeilTest(float argRandom) {
    float a = (float) StrictMath.ceil(argRandom);
    aStore += a;
  }

  public void runFastCeilTest(float argRandom) {
    float a = MathUtils.fastCeil(argRandom);
    aStore += a;
  }

  @Override
  public String getTestName(int argNum) {
    return tests[argNum];
  }

  public static void main(String[] c) {
    MathPerf p = new MathPerf();
    p.go();
  }
}