@mapbox/tile-cover/bench.js

generate the minimum number of tiles to cover a geojson geometry

'use strict';

var Benchmark = require('benchmark');
var cover = require('./index.js').tiles;
var fs = require('fs');

var building = JSON.parse(fs.readFileSync('./test/fixtures/building.geojson'));
var line = JSON.parse(fs.readFileSync('./test/fixtures/road.geojson'));
var point = JSON.parse(fs.readFileSync('./test/fixtures/point.geojson'));
var russia = JSON.parse(fs.readFileSync('./test/fixtures/russia.geojson'));
var russiaLine = {type: 'LineString', coordinates: russia.coordinates[0]};
var zooms = [6, 8, 10, 12, 18, 20, 25, 28];

var suite = new Benchmark.Suite('tile-cover', {
    onError: function (err) {
        console.log(err);
    }
});

addBench(suite, point, 'point', zooms[0], zooms[0]);

zooms.forEach(function (zoom) {
    addBench(suite, line, 'road', zoom, zoom);
});
zooms.forEach(function (zoom) {
    addBench(suite, building, 'building', zoom, zoom);
});
zooms.slice(0, 3).forEach(function (zoom) {
    addBench(suite, russia, 'russia polygon', zoom, zoom);
});
zooms.slice(0, 3).forEach(function (zoom) {
    addBench(suite, russiaLine, 'russia polyline', zoom, zoom);
});

addBench(suite, russia, 'russia polygon multizoom', 0, 9);

suite.on('cycle', function (event) {
    console.log(String(event.target));
}).run();

function addBench(suite, geometry, name, min_zoom, max_zoom) {
    suite.add('scan ' + name + ' - z' + min_zoom + ' - z' + max_zoom, {
        fn: function () {
            cover(geometry, {min_zoom: min_zoom, max_zoom: max_zoom});
        },
        maxTime: 1
    });
}