Performance Optimization Techniques

Using traditional for loops with cached length is generally the most efficient approach when working with large arrays in performance-critical code. This approach has several advantages: 1) It minimizes overhead by avoiding function calls for each iteration, 2) Caching the array length (const len = array.length) prevents re-checking the length property on each iteration, 3) It gives you full control over the iteration process, and 4) Modern JavaScript engines are highly optimized for this pattern. While Array methods like map() and filter() provide better readability and are suitable for most cases, they create additional function contexts and often generate intermediate arrays. The performance difference becomes more noticeable with very large arrays (thousands or millions of elements) or when the operation runs frequently in performance-critical paths.