Find smallest number in Javascript array. Much faster than Math.min.apply

min_array.js

function min(arr) {
    var l, a, b;
    while(true) {
        l = arr.length;
        if(l < 2) return arr[0];
        a = arr.pop();
        b = arr[l-2];
        if(a < b) {
            arr.pop();
            arr.push(a);
        }
    }  
}