In the ever-evolving landscape of web development, performance remains a crucial factor for both user experience and business success. PHP 8.3, released in November 2023, brought several exciting features aimed at enhancing application performance, with Utilizing JIT compilation taking center stage. This article delves into the world of PHP 8.3 performance optimization, exploring how JIT works and showcasing concrete examples of how you can leverage these new features to achieve real-world performance gains.