Note that there's two separate factorial functions. I figured this would be fairer, especially in a tracing JIT. Constructive criticism welcome.
<!DOCTYPE html>
<html>
<head><title>( ﾟ ヮﾟ) MITON GA SUKI!</title><meta http-equiv="Content-Type" value="text/html; encoding=utf-8"></head>
<script type="text/javascript">
function factorialAnon(x) {
for(var i = x-1; i > 0; --i)
x *= i;
return x;
}
function benchAnon(control, fun, args) {
var startDate = new Date().getTime();
control(fun, args);
var endDate = new Date().getTime();
return endDate - startDate;
}
function loopAnon(n) {
return function(f) {
for(var i = 0; i <= n; ++i) {
var res = f();
}
}
}
</script>
<script type="text/javascript">
function factorialFV(x){for(var i=x-1;i>0;i--){x*=i};return x}
function benchFV(x,y,z,z1,z2,z3,z4,z5,z6,z7,z8,z9,z10){var d=new Date();var std=d.getTime();var res=x(y,z,z1,z2,z3,z4,z5,z6,z7,z8,z9,z10);var d2=new Date();var std2=d2.getTime();
var diff=std2-std;return diff}
function loopFV(x,y,z,z1,z2,z3,z4,z5,z6,z7,z8,z9,z10){for(var i=y-1;i>-1;i--){var res=x(z,z1,z2,z3,z4,z5,z6,z7,z8,z9,z10)}}
</script>
function doBench() {
var res = [[], []]
var n;
try {
n = parseInt(document.form.iterations.value);
} catch(e) { n = 1000000; alert("You failed to type a proper number, so I'll just use 1000000"); }
for(var i = 0; i < 5; ++i) {
res[0].push(benchAnon(loopAnon(n), factorialAnon, [45]));
res[1].push(benchFV(loopFV, factorialFV, n, 45));
}
document.documentElement.appendChild(document.createElement("HR"));
var pre = document.createElement("PRE");
pre.appendChild(document.createTextNode("With " + n + " iterations:\n Anon: " + show(res[0]) + "\n FrozenVoid: " + show(res[1])));
document.documentElement.appendChild(pre);
}
</script>
<body>
<form name="form">
<input type="text" name="iterations" value="1000000">
<input type="button" onclick="doBench()" value="Go!">
</form>
<p>Times are in milliseconds.</p>
</body>
</html>