Performance Optimization Techniques

The 'for...of' loop allows early termination with break, which is its key performance benefit compared to Array.prototype.forEach(). With forEach(), you must always iterate through every element in the array, even if you found what you were looking for early in the iteration. In contrast, for...of allows you to use break to exit the loop early, return to exit the containing function, or continue to skip to the next iteration. This can significantly improve performance when you only need to process elements until a certain condition is met. While for...of might have slightly different performance characteristics depending on the JavaScript engine and use case, the ability to break early is its most consistent advantage from a performance perspective.