what_is_inline_caching_.md

What is inline caching?

What is inline caching?

Inline caching is a JavaScript engine optimization technique that speeds up property access by caching the results of previous lookups.

Key Points:

1. Purpose:

   • Reduce the overhead of repeatedly resolving the same property or method on an object.

2. How It Works:

   • During the first lookup, the engine determines the property location and caches it.
   • On subsequent accesses, the engine uses the cached result, bypassing the need for lookup.

Example:

function add(a, b) {
  return a.value + b.value;
}

const obj1 = { value: 10 };
const obj2 = { value: 20 };

console.log(add(obj1, obj2)); // Inline caching optimizes property access.

Tags: advanced, JavaScript, V8 Engine