http://www.nobraintoosmall.co.nz/html/senior_biology/assets/js/Timer.js

1// Script adapted by Mark Standley 30 July 2026
2function add()
3{
4    for (var i = 0; i < 1000000; i++)
5    {
6        //some overhead
7    }
8    return 12 + 89;
9}
10
11window.onload = function()
12{
13    if ("performance" in window && "now" in window.performance)
14    {
15        var start_time = performance.now();
16        add();
17        var end_time = performance.now();
18
19        var n = (end_time - start_time).toFixed(2);
20        document.getElementById("time_taken").innerHTML = n + " ms";
21    }
22    else
23    {
24        document.getElementById("time_taken").innerHTML = "API not supported";
25    }
26}