fast-deep-equal is a high-performance JavaScript library for deeply comparing two values. It efficiently determines if two objects or arrays contain the same values, even if nested. This library focuses on speed and avoids unnecessary comparisons, making it ideal for performance-critical applications. It supports various data types, including objects, arrays, dates, and regular expressions, providing a reliable deep comparison solution for Node.js and browser environments.
Fast-deep-equal's release frequency is inconsistent. Initial releases occurred in 2017, with a few versions. New versions were released in 2018. There were a couple of releases in late 2019, and one in June 2020, but no releases since. The package has been dormant since the summer of 2020.
Fast-deep-equal's npm downloads show strong growth from March 2024 to August 2025, peaking in June and July 2025 with over 330 million downloads. September 2025 data is incomplete and shows a significant drop, but the overall trend indicates increasing popularity before that.
