Reduce Maths

Benchmark created by Joe Turner on August 17, 2011

Preparation HTML

<script>
  var UnreducedDSP = function() {
      this.buffer = new Float32Array(1024);
  };
  
  UnreducedDSP.prototype.generate = function() {
      var frequency = 200;
  
      var buffer = this.buffer;
      var bufferLength = buffer.length;
      for (var i=0; i<bufferLength; i++) {
          // Change the frequency half way through the buffer
          if (i == 512) {
              frequency += 100;
          }
          buffer[i] = Math.exp(frequency);
      }
  };
  
  var ReducedDSP = function() {
      this.buffer = new Float32Array(1024);
  };
  
  ReducedDSP.prototype.generate = function() {
      var frequency = 200;
      var lastFrequency = frequency;
      var value = Math.exp(frequency);
  
      var buffer = this.buffer;
      var bufferLength = buffer.length;
      for (var i=0; i<bufferLength; i++) {
          // Change the frequency half way through the buffer
          if (i == 512) {
              frequency += 100;
          }
  
          if (frequency != lastFrequency) {
              value = Math.exp(frequency);
              lastFrequency = frequency;
          }
          buffer[i] = value;
      }
  };
  
  var unreducedDSP = new UnreducedDSP();
  
  var reducedDSP = new ReducedDSP();
</script>

Test runner

unreducedDSP.generate();

reducedDSP.generate();

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.

• Revision 1: published by Joe Turner on August 17, 2011