lb-ratio/test/js/Ratio-benchmark.js

Provides a Fraction, Rational, and Ratio object for javascript.

/**
 * Quick hack to provides benchmark data for Ratio.js
 * @author Larry Battle <bateru.com/news>
 * @date April 21, 2013
 * @requires Ratio.js
 */
(function() {
  // Test Class
  var Test = function(name, func, delay) {
    this.name = name || "";
    this.func = func;
    this.startTime = 0;
    this.endTime = 0;
    this.duration = 0;
  };
  Test.prototype.run = function() {
    this.startTime = +(new Date());
    this.func();
    this.endTime = +(new Date());
    this.duration = this.endTime - this.startTime;
  };
  // Suite Class
  var Suite = function() {
    this.tests = [];
  };
  Suite.prototype.add = function(name, func) {
    this.tests.push(
      new Test(name, func)
    );
  };
  Suite.prototype.run = function() {
    this.forEachTest(function(test) {
      test.run();
    });
  };
  Suite.prototype.forEachTest = function(fn) {
    var i, len;
    for (i = 0, len = this.tests.length; i < len; i++) {
      fn(this.tests[i]);
    }
  };
  var createRow = function(arr) {
    var row = "<tr>";
    for (var i = 0, len = arr.length; i < len; i++) {
      row += "<td>";
      row += arr[i];
      row += "</td>";
    }
    row += "</tr>";
    return row;
  };
  var createTableHeader = function() {
    return "<thead>" + createRow(["Name", "Description"]) + "</thead>";
  };
  Suite.prototype.printResults = function() {
    var el = document.getElementById("results");
    var html = "<table>" + createTableHeader();
    this.forEachTest(function(test) {
      // html += "<li>"+test.name + " : " + test.duration + "ms </li>";
      html += createRow([test.name, test.duration + " ms"]);
    });
    el.innerHTML = html + "</table>";
  };

  var tests = new Suite();
  tests.add("Ratio()", function() {
    var i = 1e5;
    while (i--) {
      Ratio(3);
      Ratio(1, 3);
      Ratio(-3, -3);
      Ratio(10, -10);
      Ratio(-400, 5);
    }
  });
  tests.add("Ratio.gcd()", function() {
    var func = Ratio.gcd,
      i = 1e5;
    while (i--) {
      func(1, 20);
      func(111, 111);
      func(4e3, 20e3);
      func(1e3, 270);
      func(134, 200);
    }
  });
  tests.add("Ratio.parse()", function() {
    var func = Ratio.parse,
      i = 1e5;
    while (i--) {
      func("1/2");
      func("1/-2");
      func("1.333333333333333333");
      func(-23.1e43, 443);
      func(0.234, 0.24432);
      func("54/34", "12/3");
    }
  });
  tests.add("Ratio.prototype.clone()", function() {
    var func = function(a, b) {
        Ratio(a, b).clone();
      },
      i = 1e5;
    while (i--) {
      func(1, 20);
      func(111, 111);
      func(4e3, 20e3);
      func(1e3, 270);
      func(134, 200);
    }
  });
  tests.add("Ratio.prototype.add()", function() {
    var a = Ratio(),
      i = 1e5;
    while (i--) {
      a.add(1, 20);
      a.add(111, 111);
      a.add(4e3, 20e3);
      a.add(1e3, 270);
      a.add(134, 200);
    }
  });
  tests.add("Ratio.prototype.subtract()", function() {
    var a = Ratio(),
      i = 1e5;
    while (i--) {
      a.subtract(1, 20);
      a.subtract(111, 111);
      a.subtract(4e3, 20e3);
      a.subtract(1e3, 270);
      a.subtract(134, 200);
    }
  });
  tests.add("add and subtract", function() {
    var addAndSubtract = function(a) {
      return Ratio.parse(a).add(a).subtract(a).equals(a);
    };
    for (var i = 0, len = 1e5; i < len; i++) {
      addAndSubtract((Math.random() * 1e4).toFixed(3));
    }
  });
  tests.add("Ratio.prototype.divide()", function() {
    var a = Ratio(),
      i = 1e5;
    a.divide(1, 20);
    while (i--) {
      a.divide(111, 111);
      a.divide(4e3, 20e3);
      a.divide(1e3, 270);
      a.divide(134, 200);
    }
  });
  tests.add("Ratio Use case", function() {
    var i = 1e5;
    while (i--) {
      Ratio.parse(1 / 3).negate().add("-0.1").multiply(0xF3).divide(1, 2).divide(1e-4).abs().toString();
    }
  });
  tests.run();
  tests.printResults();
}());