JavaScript Memoization

What is Memoization?

Cache function results:

```javascript function memoize(fn) { const cache = {}; return function(...args) { const key = JSON.stringify(args); if (cache[key]) return cache[key]; cache[key] = fn(...args); return cache[key]; }; } ```

Key Takeaway

Memoization caches results. Avoids redundant calculations. Improves performance for expensive functions.