haversine_salvador (v2)

Revision 2 of this benchmark created by decad on

Description

Different haversine formulas - Store Math.PI to var

Setup

function deg2rad(deg) {
      return deg * Math.PI / 180
    }
    var pi180 = Math.PI / 180;
    var REarth = 6371; // Radius of the earth in km

Test runner

Ready to run.

Testing in
TestOps/sec
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);
ready
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);
ready
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);
ready
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);
ready
5
function distance(lat1, lon1, lat2, lon2) {
          var dLat = (lat2 - lat1) * pi180;  // deg2rad below
          var dLon = (lon2 - lon1) * pi180;
          var a =  0.5 - Math.cos(dLat)/2 +   Math.cos(lat1 * pi180) * Math.cos(lat2 * pi180) *  (1 - Math.cos(dLon))/2;

          return R * 2 * Math.asin(Math.sqrt(a));
        }
distance(48, -122, 49, -121);
 
ready

Revisions

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