Fast.js – faster reimplementations of native JavaScript functions

In plain words

Fast.js provides faster alternative implementations of common JavaScript built-in functions for developers optimizing performance-critical code. It replaces standard functions with streamlined versions that execute more quickly in user-land code. The library targets JavaScript developers working on projects where function call performance matters, particularly those handling frequent operations like array methods or other built-in utilities. Fast.js lets developers swap in faster equivalents without changing their application logic.

written from the facts on this page · September 2026

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