Several key techniques and best practices to help make JavaScript run extremely fast. Some of these involve optimizing how you handle objects, memory, and data structures, as well as leveraging modern JavaScript engine optimizations. Here are some key points:
- When you create objects using
{}
, they inherit fromObject.prototype
, which can introduce unnecessary properties and methods. UsingObject.create(null)
creates an object with no prototype, making it a cleaner and faster option for objects used purely as maps or state stores. This reduces overhead from the prototype chain.
- Repeatedly creating objects inside a loop can lead to excessive memory allocations and garbage collection. Instead, reuse objects where possible or move object creation outside the loop.
- While closures are powerful, they can sometimes lead