Chrome is toying with the idea of “use stricter” to allow significant speed improvements
Restrictions include no sparse arrays, ES6 class instances are sealed, and a few minor restrictions that have not yet been finalized.
Dr. Axel Rauschmayer summarizes:
Google is currently working on SoundScript, a way to speed up object-oriented programming in JavaScript. The content of this blog post is completely based on a recent talk by Dmitry Lomov. That is, everything I have written here is inferred from those slides and may or may not be correct.
Read more from the source: 2ality.com