Fibonacci Sequence for JavaScript using Recursion

fib.js

const fib = (laps, oldNumber = 1, oldestNumber = 0) => {
  if (laps === 0) return oldestNumber;
  if (laps === 1) return oldNumber;
  const sum = BigInt(oldNumber) + BigInt(oldestNumber);
  return fib(laps - 1, sum, oldNumber);
};

console.time("res");
console.log(fib(1_000_000))
console.timeEnd("res");