assignment vs push

var MAX = 10000000, i;

var arr = [];

console.time("assignment");
for (i = 0; i < MAX; i++) {
    arr[arr.length] = i;
}
console.timeEnd("assignment");

arr.length = 0;

console.time("push");
for (i = 0; i < MAX; i++) {
    arr.push( i );
}
console.timeEnd("push");

arr.length = 0;