“RangeError: Maximum call stack size exceeded” Why?

Browsers can’t handle that many arguments. See this snippet for example:

alert.apply(window, new Array(1000000000));

This yields RangeError: Maximum call stack size exceeded which is the same as in your problem.

To solve that, do:

var arr = [];
for(var i = 0; i < 1000000; i++){
    arr.push(Math.random());
}