reduce vs for loop

reduce_for.js

var top = 10000000;
var glass = [];
var t = 0;
var sum = 0;

for(var i = 0;i<top;i++){
    t += i;
    glass[glass.length] = {amount: t}
}
console.time("for time");
    var l = glass.length;
    for(var i = 0;i<l;i++){
        sum += glass[i].amount;
    }
console.timeEnd("for time");
console.info("for total ", sum)


console.log("-------------------------------")

sum  = 0;

console.time("reduce time");
    sum = glass.reduce(function (last, d) {
        return parseInt(d.amount + last);
    });
console.timeEnd("reduce time");
console.info("reduce total ", sum)