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How to implement guide with handling recursive function calls leading to stack overflow in javascript

πŸ‘€ Views: 464 πŸ’¬ Answers: 1 πŸ“… Created: 2025-06-16
javascript recursion fibonacci performance optimization JavaScript

Quick question that's been bugging me - After trying multiple solutions online, I still can't figure this out... I've been struggling with this for a few days now and could really use some help. I'm working with a `RangeError: Maximum call stack size exceeded` when trying to implement a recursive function in JavaScript to calculate Fibonacci numbers. I expected the function to handle inputs up to 30 without crashing, but it seems to hit a wall at around 20. Here is the code I've written: ```javascript function fibonacci(n) { if (n <= 1) return n; return fibonacci(n - 1) + fibonacci(n - 2); } console.log(fibonacci(20)); // This works fine console.log(fibonacci(30)); // This throws a RangeError ``` I’ve tried optimizing it by adding memoization to store previously calculated values, but I still face performance optimization with larger inputs. Here’s my attempt at that: ```javascript const memo = {}; function fibonacciMemo(n) { if (n in memo) return memo[n]; if (n <= 1) return n; memo[n] = fibonacciMemo(n - 1) + fibonacciMemo(n - 2); return memo[n]; } console.log(fibonacciMemo(30)); // This is much faster, but still not efficient for very large numbers ``` While memoization improves performance, the function still doesn't handle very large input values well. I’ve also read that using an iterative approach could be more efficient. Can someone suggest how I might implement an iterative version of the Fibonacci function, or better yet, detail any other optimizations I might be missing? Any guidance would be appreciated, especially regarding best practices for handling recursion in JavaScript. Has anyone else encountered this? My development environment is Windows. I'd really appreciate any guidance on this. This is for a REST API running on Linux. Any examples would be super helpful.