## JavaScript performance comparison

Revision 3 of this test case created by Salvador Dali

## Preparation code

``````

<script>
Benchmark.prototype.setup = function() {
return deg * Math.PI / 180
}

};

</script>
``````

## Test runner

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Java applet disabled.

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

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

distance(48, -122, 49, -121);``````
pending…
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…
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…
5
``````function distance(lat1, lon1, lat2, lon2) {
return 12742 * Math.asin(Math.sqrt(
0.5 - Math.cos((lat2 - lat1) * Math.PI / 180)/2 +
Math.cos(lat1 * Math.PI / 180) * Math.cos(lat2 * Math.PI / 180) *
(1 - Math.cos((lon2 - lon1) * Math.PI / 180))/2
));
}

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

## Revisions

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