Benchmark: Haversine - MeasureThat.net

Script Preparation code:

  var TO_RAD = Math.PI / 180;
  
  function toRad(deg) {
   return deg * TO_RAD;
  }
  
  var coords = new Array();
  
  function randomLat() {
   return Math.random() * 180 - 90;
  }
  
  function randomLong() {
   return Math.random() * 360 - 180;
  }
  
  for (var i = 0; i < 5000; i++) {
   coords.push([randomLat(), randomLong(), randomLat(), randomLong()]);
  }
  
  function compute(coord, f) {
   return f(coord[0], coord[1], coord[2], coord[3]);
  }
  
  function test(f) {
   for (var i = 0; i < coords.length; i++) {
    var coord = coords[i];
    compute(coord, f);
   }
  }
  
  var R = 6371009; // m
  var R2 = 6371009 * 2; // m
  
  function distance1(lat1, lon1, lat2, lon2) {
   var R = 6371009; // m
   var dLat = toRad(lat2 - lat1);
   var dLon = toRad(lon2 - lon1);
  
   var a = Math.sin(dLat / 2) * Math.sin(dLat / 2) + Math.cos(toRad(lat1)) * Math.cos(toRad(lat2)) * Math.sin(dLon / 2) * Math.sin(dLon / 2);
   var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
   return R * c;
  }
  
  function distance2(lat1, lon1, lat2, lon2) {
   var aLat = toRad(lat1);
   var bLat = toRad(lat2);
   var dLat2 = (bLat - aLat) / 2;
   var dLon2 = toRad(lon2 - lon1) / 2;
   var x = Math.sin(dLat2) * Math.sin(dLat2) + Math.cos(aLat) * Math.cos(bLat) * Math.sin(dLon2) * Math.sin(dLon2);
   return R * 2 * Math.atan2(Math.sqrt(x), Math.sqrt(1 - x));
  }
  
  function distance3(lat1, lon1, lat2, lon2) {
   var aLat = toRad(lat1);
   var bLat = toRad(lat2);
   var dLat2 = (bLat - aLat) * 0.5;
   var dLon2 = toRad(lon2 - lon1) * 0.5;
   var sindLat = Math.sin(dLat2);
   var sindLon = Math.sin(dLon2);
   var x = sindLat * sindLat + Math.cos(aLat) * Math.cos(bLat) * sindLon * sindLon;
   return R2 * Math.atan2(Math.sqrt(x), Math.sqrt(1 - x));
  }
  
  function distance4(lat1, lon1, lat2, lon2) {
   var aLat = lat1 * TO_RAD;
   var bLat = lat2 * TO_RAD;
   var dLat2 = (bLat - aLat) * 0.5;
   var dLon2 = (lon2 - lon1) * TO_RAD * 0.5;
   var sindLat = Math.sin(dLat2);
   var sindLon = Math.sin(dLon2);
   var x = sindLat * sindLat + Math.cos(aLat) * Math.cos(bLat) * sindLon * sindLon;
   return R2 * Math.atan2(Math.sqrt(x), Math.sqrt(1 - x));
  }
  
  function distance5(lat1, lon1, lat2, lon2) {
   var aLat = toRad(lat1);
   var bLat = toRad(lat2);
   var dLat2 = (bLat - aLat) * 0.5;
   var dLon2 = toRad(lon2 - lon1) * 0.5;
   var sindLat = Math.sin(dLat2);
   var sindLon = Math.sin(dLon2);
   var x = sindLat * sindLat + Math.cos(aLat) * Math.cos(bLat) * sindLon * sindLon;
   return R2 * Math.asin(Math.sqrt(x));
  }

Tests:

Distance1
test(distance1)
Distance2
test(distance2)
Distance3
test(distance3)
Distance4
test(distance4)
Distance5
test(distance5)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Distance1
Distance2
Distance3
Distance4
Distance5

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

Let's break down the benchmark and explain what's being tested.

**Benchmark Definition**

The benchmark definition is represented by the JSON object that contains the JavaScript code for the test case. In this case, we have five test cases: `distance1`, `distance2`, `distance3`, `distance4`, and `distance5`. Each test case corresponds to a different implementation of calculating the distance between two points on a sphere (the Earth).

**Test Cases**

Each test case is defined by a single line of code that calls the `test()` function, passing the name of the distance calculation function as an argument. For example, the first test case `distance1` is defined by the line `test(distance1)`.

**Distance Calculation Functions**

The five distance calculation functions are implemented using trigonometric formulas to calculate the distance between two points on a sphere. Each function takes four arguments: `lat1`, `lon1`, `lat2`, and `lon2`, which represent the latitude and longitude of the two points.

Here's a brief overview of each function:

* `distance1`: uses the Haversine formula to calculate the distance between two points.
* `distance2`: uses a simplified version of the Haversine formula, but with a different implementation detail (explained later).
* `distance3`, `distance4`, and `distance5`: use similar implementations as `distance2`, but with minor variations.

**Implementation Differences**

The main difference between `distance2` and the other three functions is that it uses a faster algorithm to calculate the sine of the latitude and longitude values. Specifically, it uses a lookup table to precompute the sine values for common latitude and longitude ranges. This optimization reduces the number of trigonometric operations required by the algorithm.

**Test Results**

The latest benchmark results show the performance of each test case on a Chrome 120 browser running on a Windows desktop. The results are displayed as an array of objects, each containing information about the execution frequency (ExecutionsPerSecond) and other metadata.

Overall, this benchmark is designed to compare the performance of different distance calculation algorithms implemented in JavaScript, with a focus on optimization and accuracy.

Latest run results:

Run details: (Test run date: 4 days ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36

Browser/OS: Chrome 130 on Windows

View result in a separate tab

Test name	Executions per second
Distance1	1433.5 Ops/sec
Distance2	982.5 Ops/sec
Distance3	985.1 Ops/sec
Distance4	990.1 Ops/sec
Distance5	1099.8 Ops/sec

Related benchmarks:

Haversine (version: 0)

Comparing performance of: Distance1 vs Distance2 vs Distance3 vs Distance4 vs Distance5

Created: 7 years ago by: Guest

Jump to the latest result

Distance1

Distance2

Distance3

Distance4

Distance5

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):