Day 8/30 - Talk JavaScript To Me: Memoization

Let's start with a silly programming joke, shall we ? ??

How do you comfort a JavaScript bug?
You console it. ??        

In the realm of JavaScript development, optimizing performance is crucial for enhancing user experience and application responsiveness. Memoization and caching are two powerful techniques that can dramatically improve the efficiency of your code. So, let's dive into how they work and how to use them effectively.

Memoization

Memoization is an optimisation technique that stores the results of expensive calculations in a cache. When a function is called with the same arguments multiple times, it returns the cached result instead of recomputing it. This can lead to significant reduction in the execution time of your code.

Implementing Memoization:

You can implement memoization using a simple object to store the cached results. For instance, let's create a function that calculates the Fibonacci sequence:

const fib = (() => {
  const cache = {};

  return function(n) {
    if (n in cache) {
      return cache[n];
    }

    if (n <= 1) {
      return n;
    }

    cache[n] = fib(n - 1) + fib(n - 2);
    return cache[n];
  };
})();

// Example usage
console.log(fib(10)); // Output: 55
console.log(fib(20)); // Output: 6765
console.log(fib(50)); // Output: 12586269025        

Benefits of Memoization

Improved performance: By reducing the number of computations and database queries, these techniques can significantly improve the speed and responsiveness of your application.

Reduced resource consumption: By caching data, you reduce the load on servers and reduce network bandwidth usage.

Enhanced user experience: Faster applications make for a more enjoyable user experience by reducing wait times and improving overall responsiveness.

Conclusion

Memoization is an essential performance optimisation techniques for JavaScript developers. By understanding how they work and implementing them effectively, you can enhance the efficiency and user experience of your applications. Remember to use these techniques judiciously to avoid potential memory issues or performance degradation in certain scenarios.

Feel free to reach out if you have any questions or want to discuss more about JavaScript and its quirks! Even if you do not agree with this post ??

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