Original table has 700k points. To compare load times, select a layer (You must be connected to the VPN) and open developer tools and check console output
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October 4, 2018 16:43
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overviews vs aggregation vs original data
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset='utf-8' /> | |
| <title>Tiles performance</title> | |
| <meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' /> | |
| <link rel="stylesheet" href="https://unpkg.com/leaflet@1.2.0/dist/leaflet.css" | |
| integrity="sha512-M2wvCLH6DSRazYeZRIm1JnYyh22purTM+FDB5CsyxtQJYeKq83arPe5wgbNmcFXGqiSH2XR8dT/fJISVA1r/zQ==" | |
| crossorigin=""/> | |
| <script src="https://unpkg.com/leaflet@1.2.0/dist/leaflet.js" | |
| integrity="sha512-lInM/apFSqyy1o6s89K4iQUKg6ppXEgsVxT35HbzUupEVRh2Eu9Wdl4tHj7dZO0s1uvplcYGmt3498TtHq+log==" | |
| crossorigin=""></script> | |
| <style> | |
| body { | |
| margin:0; | |
| padding:0; | |
| } | |
| #map { | |
| position: absolute; | |
| top: 0; | |
| left: 0; | |
| width: 100%; | |
| height: 100%; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id='map'></div> | |
| <script> | |
| const map = L.map('map').setView([20, 0], 2); | |
| const user = 'dgaubert-over'; | |
| const endpoint = (username) => { | |
| return `http://${user}.carto-staging.com/api/v1/map` | |
| } | |
| const layerUrl = function url(layergroup, layerIndex) { | |
| if (layergroup.cdn_url && layergroup.cdn_url.templates) { | |
| const urlTemplates = layergroup.cdn_url.templates.https; | |
| return `${urlTemplates.url}/${user}/api/v1/map/${layergroup.layergroupid}/${layerIndex}/{z}/{x}/{y}.png` | |
| } | |
| return `${endpoint(user)}/${layergroup.layergroupid}/${layerIndex}/{z}/{x}/{y}.png` | |
| } | |
| const layerSubdomains = function subdomains(layergroup) { | |
| if (layergroup.cdn_url && layergroup.cdn_url.templates) { | |
| const urlTemplates = layergroup.cdn_url.templates.https; | |
| return urlTemplates.subdomains; | |
| } | |
| return []; | |
| } | |
| const basemapLayer = L.tileLayer('https://{s}.basemaps.cartocdn.com/rastertiles/voyager_labels_under/{z}/{x}/{y}.png', { | |
| maxZoom: 18, | |
| attribution: '© <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>, © <a href="https://carto.com/attribution">CARTO</a>' | |
| }).addTo(map); | |
| let layersControl = L.control.layers({}).addTo(map); | |
| (async () => { | |
| map.eachLayer(layer => { | |
| if (layer !== basemapLayer) { | |
| map.removeLayer(layer); | |
| } | |
| }); | |
| layersControl.remove(); | |
| const mapConfig = { | |
| layers: [ | |
| { | |
| "id": "layer-with-overviews", | |
| "type": "mapnik", | |
| "options": { | |
| "cartocss": `/* cache buster ${Date.now()} */ #layer {\n marker-width: 8;\n marker-fill: #4d58ee;\n marker-fill-opacity: 0.9;\n marker-allow-overlap: true;\n marker-line-width: 1;\n marker-line-color: #FFFFFF;\n marker-line-opacity: 1;\n}`, | |
| "cartocss_version": "2.1.1", | |
| "sql": "SELECT * FROM hubbiii_new", // dataset with overviews | |
| "interactivity": [ | |
| "cartodb_id" | |
| ] | |
| } | |
| }, | |
| { | |
| "id": "layer-without-overviews-and-aggregation", | |
| "type": "mapnik", | |
| "options": { | |
| "cartocss": `/* cache buster ${Date.now()} */ #layer {\n marker-width: 8;\n marker-fill: #4d58ee;\n marker-fill-opacity: 0.9;\n marker-allow-overlap: true;\n marker-line-width: 1;\n marker-line-color: #FFFFFF;\n marker-line-opacity: 1;\n}`, | |
| "cartocss_version": "2.1.1", | |
| "sql": "SELECT * FROM hubbiii_new_no_overviews", // dataset without overviews | |
| "interactivity": [ | |
| "cartodb_id" | |
| ] | |
| } | |
| }, | |
| { | |
| "id": "layer-with-aggregation", | |
| "type": "mapnik", | |
| "options": { | |
| "cartocss": `/* cache buster ${Date.now()} */ #layer {\n marker-width: 8;\n marker-fill: #4d58ee;\n marker-fill-opacity: 0.9;\n marker-allow-overlap: true;\n marker-line-width: 1;\n marker-line-color: #FFFFFF;\n marker-line-opacity: 1;\n}`, | |
| "cartocss_version": "2.1.1", | |
| "sql": "SELECT * FROM hubbiii_new_no_overviews", // dataset without overviews | |
| "interactivity": [ | |
| "cartodb_id" | |
| ], | |
| "aggregation": true | |
| } | |
| } | |
| ] | |
| } | |
| const response = await fetch(endpoint(user), { | |
| method: 'POST', | |
| headers: { | |
| 'Accept': 'application/json', | |
| 'Content-Type': 'application/json' | |
| }, | |
| body: JSON.stringify(mapConfig) | |
| }); | |
| const layergroup = await response.json(); | |
| const layerOverviews = L.tileLayer(layerUrl(layergroup, 0), { subdomains: layerSubdomains(layergroup) }); | |
| const layerOriginalData = L.tileLayer(layerUrl(layergroup, 1), { subdomains: layerSubdomains(layergroup) }); | |
| const layerAggregation = L.tileLayer(layerUrl(layergroup, 2), { subdomains: layerSubdomains(layergroup) }); | |
| const layers = { | |
| 'Overviews': layerOverviews, | |
| 'Original data': layerOriginalData, | |
| 'Default aggregation': layerAggregation | |
| }; | |
| let timeStart; | |
| const resetTimer = e => { | |
| timeStart = Date.now(); | |
| } | |
| map.on('layeradd', resetTimer); | |
| map.on('zoom', resetTimer); | |
| Object.keys(layers).forEach(name => { | |
| const layer = layers[name]; | |
| layer.on('tileloadstart', e => { | |
| e.tile.startTime = Date.now(); | |
| }); | |
| layer.on('tileload', e => { | |
| console.log(e.coords, Date.now() - e.tile.startTime) | |
| }); | |
| layer.on('load', e => { | |
| console.log(`[PERF] ${name} = ${Date.now() - timeStart}ms`) | |
| }); | |
| }); | |
| layerOverviews.addTo(map); | |
| layersControl = L.control.layers(layers).addTo(map); | |
| })(); | |
| </script> | |
| </body> | |
| </html> |
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