Benchmark: getCoordAndBearing

HTML Preparation code:

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  }
}

function updateDistances(line) {
	var coords = turf.getCoords(line);
	var travelled = 0;
	var distances = [];
	var i;

	for (i = 0; i < coords.length; i++) {
		if (i > 0) {
			travelled += turf.distance(coords[i - 1], coords[i]);
		}
		distances.push(travelled);
	}
	line.properties.distances = distances;
}

function getCoordAndBearing1(line, distance) {
	var coords = turf.getCoords(line);
	var distances = line.properties.distances;
	var length = coords.length;
	var index, coord, overshot, altitude, bearing;

	if (distance >= distances[length - 1]) {
		return {
			coord: coords[length - 1],
			altitude: coords[length - 1][2] || 0,
			bearing: turf.bearing(coords[length - 2], coords[length - 1])
		};
	}

	function findPoint(start, end) {
		var center;
		if (start === end - 1) {
			return start;
		}
		center = Math.floor((start + end) / 2);
		if (distance < distances[center]) {
			return findPoint(start, center);
		} else {
			return findPoint(center, end);
		}
	}

	index = findPoint(0, length - 1);
	coord = coords[index];
	overshot = distance - distances[index];
	altitude = coord[2] || 0;
	bearing = turf.bearing(coord, coords[index + 1]);
	return {
		coord: overshot === 0 ? coord : turf.getCoord(turf.destination(coord, overshot, bearing)),
		altitude: altitude + ((coords[index + 1][2] || 0) - altitude) * overshot / (distances[index + 1] - distances[index]),
		bearing: bearing
	};
}

function getCoordAndBearing2(line, distance) {
	var coords = turf.getCoords(line);
	var distances = line.properties.distances;
	var length = coords.length;
	var index, coord, overshot, altitude, bearing, start, end, center;

	if (distance >= distances[length - 1]) {
		return {
			coord: coords[length - 1],
			altitude: coords[length - 1][2] || 0,
			bearing: turf.bearing(coords[length - 2], coords[length - 1])
		};
	}

  	start = 0;
    end = length - 1;
    while (start !== end - 1) {
		center = Math.floor((start + end) / 2);
		if (distance < distances[center]) {
			end = center;
		} else {
			start = center;
		}
    }
    index = start;
  
	coord = coords[index];
	overshot = distance - distances[index];
	altitude = coord[2] || 0;
	bearing = turf.bearing(coord, coords[index + 1]);
	return {
		coord: overshot === 0 ? coord : turf.getCoord(turf.destination(coord, overshot, bearing)),
		altitude: altitude + ((coords[index + 1][2] || 0) - altitude) * overshot / (distances[index + 1] - distances[index]),
		bearing: bearing
	};
}

updateDistances(line);

Tests:

test1
result1 = getCoordAndBearing1(line, 1);
test2
result2 = getCoordAndBearing2(line, 1);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
test1
test2

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

Related benchmarks:

getCoordAndBearing (version: 0)

Comparing performance of: test1 vs test2

Created: 6 years ago by: Guest

Jump to the latest result

test1

test2

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):