A canvas demo that shifts pixels quickly. Idea from https://stackoverflow.com/a/36337777/214950. Also, trying https://developers.google.com/web/updates/2019/05/desynchronized.
xxxxxxxxxx
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Fast scrolling heatmap</title>
<style>
body {
margin: 0;
}
</style>
</head>
<body>
<canvas id="canvas"></canvas>
<script src="index.js"></script>
</body>
</html>