8

JavaScript performance comparison

Revision 32 of this test case created by Rails Jack

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  function deg2rad(deg) {
    return deg * Math.PI / 180
  }
  
  Number.prototype.toRadians = function() { return this * Math.PI / 180; };
  Number.prototype.toDegrees = function() { return this * 180 / Math.PI; };
  

};
</script>

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
3
function distance(lat1, lon1, lat2, lon2) {
  var R = 6371; // Radius of the earth in km
  var dLat = (lat2 - lat1) * Math.PI / 180; // deg2rad below
  var dLon = (lon2 - lon1) * Math.PI / 180;
  var a =
    0.5 - Math.cos(dLat) / 2 +
    Math.cos(lat1 * Math.PI / 180) * Math.cos(lat2 * Math.PI / 180) *
    (1 - Math.cos(dLon)) / 2;

  return R * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
}

distance(48, -122, 49, -121);
pending…
6
function distance(lat1, lon1, lat2, lon2) {
  var deg2rad = 0.017453292519943295; // === Math.PI / 180
  var cos = Math.cos;
  lat1 *= deg2rad;
  lon1 *= deg2rad;
  lat2 *= deg2rad;
  lon2 *= deg2rad;
  var diam = 12742; // Diameter of the earth in km (2 * 6371)
  var dLat = lat2 - lat1;
  var dLon = lon2 - lon1;
  var a = (
    (1 - cos(dLat)) +
    (1 - cos(dLon)) * cos(lat1) * cos(lat2)
  ) / 2;

  return diam * Math.asin(Math.sqrt(a));
}

distance(48, -122, 49, -121);
pending…
4
function distance(lat1, lon1, lat2, lon2) {
  var R = 6371; // Radius of the earth in km
  var dLat = (lat2 - lat1) * Math.PI / 180; // deg2rad below
  var dLon = (lon2 - lon1) * Math.PI / 180;
  var a =
    0.5 - Math.cos(dLat) / 2 +
    Math.cos(lat1 * Math.PI / 180) * Math.cos(lat2 * Math.PI / 180) *
    (1 - Math.cos(dLon)) / 2;

  return R * 2 * Math.asin(Math.sqrt(a));
}

distance(48, -122, 49, -121);
pending…
7
function distance(lat1, lon1, lat2, lon2) {
  var deg2rad = 0.017453292519943295; // === Math.PI / 180
  var cos = Math.cos;
  lat1 *= deg2rad;
  lon1 *= deg2rad;
  lat2 *= deg2rad;
  lon2 *= deg2rad;
  var a = (
    (1 - cos(lat2 - lat1)) +
    (1 - cos(lon2 - lon1)) * cos(lat1) * cos(lat2)
  ) / 2;

  return 12742 * Math.asin(Math.sqrt(a)); // Diameter of the earth in km (2 * 6371)
}

distance(48, -122, 49, -121);
pending…
2
function distance(lat1, lon1, lat2, lon2) {
  var R = 6371;
  var dLat = deg2rad(lat2 - lat1);
  var dLon = deg2rad(lon2 - lon1);
  var a =
    0.5 - Math.cos(dLat) / 2 +
    Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) *
    (1 - Math.cos(dLon)) / 2;

  return R * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
}

distance(48, -122, 49, -121);
pending…
8
function distance(lat1, lon1, lat2, lon2){
var R = 6371e3; // metres
var φ1 = lat1.toRadians();
var φ2 = lat2.toRadians();
var Δφ = (lat2-lat1).toRadians();
var Δλ = (lon2-lon1).toRadians();

var a = Math.sin(Δφ/2) * Math.sin(Δφ/2) +
        Math.cos(φ1) * Math.cos(φ2) *
        Math.sin(Δλ/2) * Math.sin(Δλ/2);
var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));

return R * c / 1000;
}

distance(48, -122, 49, -121);
pending…
5
function distance(lat1, lon1, lat2, lon2) {
  var deg2rad = Math.PI / 180;
  lat1 *= deg2rad;
  lon1 *= deg2rad;
  lat2 *= deg2rad;
  lon2 *= deg2rad;
  var diam = 12742; // Diameter of the earth in km (2 * 6371)
  var dLat = lat2 - lat1;
  var dLon = lon2 - lon1;
  var a = (
    (1 - Math.cos(dLat)) +
    (1 - Math.cos(dLon)) * Math.cos(lat1) * Math.cos(lat2)
  ) / 2;

  return diam * Math.asin(Math.sqrt(a));
}

distance(48, -122, 49, -121);
pending…
1
function distance(lat1, lon1, lat2, lon2) {
  var R = 6371; // Radius of the earth in km
  var dLat = deg2rad(lat2 - lat1); // deg2rad below
  var dLon = deg2rad(lon2 - lon1);
  var a =
    Math.sin(dLat / 2) * Math.sin(dLat / 2) +
    Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) *
    Math.sin(dLon / 2) * Math.sin(dLon / 2);

  var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
  var d = R * c; // Distance in km
  return d;
}

distance(48, -122, 49, -121);
pending…

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