👀 Views: 201 💬 Answers: 1 📅 Created: 2025-06-17

javascript recursion performance JavaScript

After trying multiple solutions online, I still can't figure this out. I'm reviewing some code and After trying multiple solutions online, I still can't figure this out... I've been banging my head against this for hours. I'm trying to implement a recursive function in JavaScript to calculate the Fibonacci sequence, but I'm working with a stack overflow behavior when I run it with larger input values. The function looks like this: ```javascript function fibonacci(n) { if (n <= 1) return n; return fibonacci(n - 1) + fibonacci(n - 2); } ``` When I call `fibonacci(50)`, I get the following behavior: ``` RangeError: Maximum call stack size exceeded ``` I've read that recursion can lead to stack overflow issues if the recursion depth is too high, but I'm wondering if there's a way to optimize this without changing the fundamental nature of the recursive approach. I've also tried using memoization by creating a cache object, but I'm not quite sure I implemented it correctly. Here’s my attempt: ```javascript const fibonacciMemo = (function() { const cache = {}; return function fib(n) { if (n in cache) return cache[n]; if (n <= 1) return n; cache[n] = fib(n - 1) + fib(n - 2); return cache[n]; }; })(); ``` However, when I run `console.log(fibonacciMemo(50));`, it performs better but still takes a long time, and I feel like I'm missing something crucial. Is there a better way to handle this? Am I using memoization correctly? Any suggestions would be greatly appreciated! How would you solve this? I'm developing on macOS with Javascript. Hoping someone can shed some light on this.