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Proposal: Add a benchmark. #235 #236

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Proposal: Add a benchmark. #235 #236

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Proposal: Add a benchmark. #235
martinfrances107 Apr 18, 2021
a024813
Removed debug.
martinfrances107 Apr 18, 2021
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70 changes: 70 additions & 0 deletions benchmark/worldMap.html
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<head>
<title>World Map - Canvas Demo</title>
<!-- Load d3.js -->
<script src="https://d3js.org/d3.v4.js"></script>
<script src="../dist/d3-geo.js"></script>
</head>

<body>
<noscript>
<p> Enable javascript to see the benchmark run.</p>
</noscript>
<p id="perf">Render Time :- </p>
<!-- Create an element where the map will take place -->
<canvas id="my_dataviz" width="440" height="320"></canvas>
<p>
Based on this tutorial:
</p>
<a href="https://www.d3-graph-gallery.com/graph/backgroundmap_canvas_basic.html">
Most basic background map in d3.js and canvas
</a>

<script>

// select the canvas element created in the html.
var canvas = document.getElementById('my_dataviz');

// Actual width and height. No idea if clienWidth would be a better option..?
var width = canvas.offsetWidth
var height = canvas.offsetHeight

// Set a projection for the map. Projection = transform a lat/long on a position on the 2d map.
var projection = d3.geoOrthographic()
.scale(width / 1.3 / Math.PI)
.translate([width / 2, height / 2])

// Get the 'context'
var ctx = canvas.getContext('2d');

// geographic path generator for given projection and canvas context
const pathGenerator = d3.geoPath(projection, ctx);

// Load external data and boot
d3.json("https://raw.githubusercontent.com/holtzy/D3-graph-gallery/master/DATA/world.geojson", function (data) {
const t0 = performance.now();

// initialize the path
ctx.beginPath();

// Got the positions of the path
pathGenerator(data);

// Fill the paths
ctx.fillStyle = "#999";
ctx.fill();

// Add stroke
ctx.strokeStyle = "#69b3a2";
ctx.stroke()
const t1 = performance.now();

elapsed = (t1 - t0).toPrecision(6);
document.getElementById("perf").innerHTML = `Render Time: ${elapsed} ms`;
})


</script>

</body>

</html>