Fibonacci Generator Version in N

const fibonacci = {
  *[Symbol.iterator]() {
    let prev = 0,
      cur = 1;

    for (;;) {
      [prev, cur] = [cur, prev + cur];

      yield cur;
    }
  },
};

console.time();

for (let i of fibonacci) {
  console.log(i);
  if (i > 100000000000) break;
}

console.timeEnd();