PHP is an interpreted programming language, which has long struggled to improve its performance, which was particularly bleak in comparison to other competing programming languages used in web development. Among what is new in PHP 8, the JIT compiler deserves special attention, as it was officially included in the latest version. Will this step be an actual breakthrough, or nothing but a blip, an interesting addition to the language? Let's see what real benefits it can bring and whether it will bring any real-world improvement of the performance of your application.