Crush JavaScript Performance with Iterator Helpers

In this video, I break down the new Iterator Helpers API and show how it outperforms traditional array methods like filter, map, and slice. Using real benchmarks on 100,000-item arrays, you’ll see why lazy evaluation, take(), drop(), and proper iterators (.values()) can reduce execution time from milliseconds to nearly zero.

- What makes a “proper iterator”
- Why array chains create hidden performance costs
- How take() stops iteration early
- drop() vs slice() performance
- Building a custom generator to replace concat()
- Real-world timing comparisons in Node & browsers

Видео Crush JavaScript Performance with Iterator Helpers канала Joe Maddalone