A simple benchmark comparing Fireworks CS3 and Bohemian Coding Sketch. Same code can be run on both (save as .jsf for Fireworks and .jstalk for Sketch)

benchmark.js

// redefine log() if we are inside Fireworks
if (!this['log']) {
  log = alert;
}
log('Starting benchmark - ' + new Date());

// Benchmark function
function benchmark(func,msg){
  start = new Date();
  func.call();
  end = new Date();
  log('Benchmark: ' + msg + '\n' + (end - start) + ' ms.');
};

// Utility methods
Array.prototype.each = function(callback){
  for (var i = this - 1; i >= 0; i--){
    callback.call(this,this[i]);
  };
};
Number.prototype.times = function(callback){
  for (var s = this - 1; s >= 0; s--){
    callback.call(this,s);
  };
};

// Setup
var arr = new Array(10000000);
var f = function(){
  (10000000).times(function(){
    //
  });
};
var p = function(i){
  // do nothing
};
var d = function(){
  (10000000).times(function(){
    b = 'logging: ' + arguments[0];
  });
};
var d2 = function(a){
  (10000000).times(function(){
    b = 'logging: ' + a;
  });
};

benchmark(function(){
  for (var i=0; i < arr.length; i++) {
    // CS3: 2874
    // Sketch: 67
  };
},'simple loop');

benchmark(function(){
  var i = arr.length - 1;
  for (i; i >= 0; i--){
    // CS3: 2055
    // Sketch: 34
  };
},'inverse loop');

benchmark(function(){
  // Sketch: 264
  // CS3: 12546
  f();
},'function that does nothing');

benchmark(function(){
  // Sketch: 2712
  // CS3: 30775
  d(1);
},'function without parameter, using arguments');

benchmark(function(){
  // Sketch: 826
  // CS3: 30959
  d2(1);
},'function with parameter, using fixed parameter');

benchmark(function(){
  // Sketch: 1485
  // CS3: 24786
  d2();
},'function with parameter, using empty parameter');