High-Performance JavaScript Runtimes — JavaScript Runtimes

Ladybird is an independent, cross-platform web browser built from the ground up with a modular architecture. It functions as a standalone application that fetches, processes, and renders web content directly from the internet. At its core, the project serves as a research platform for browser architecture, focusing on the development of a custom rendering engine and a high-performance JavaScript runtime designed to interpret modern web standards. The browser distinguishes itself through a multi-process architecture that isolates the user interface, network requests, and web content rendering to enhance stability and security. It utilizes a custom layout engine for geometry calculation and hardware-accelerated painting to manage visual composition. To maintain responsiveness, the engine employs event-driven networking and a just-in-time compilation pipeline that translates script code into machine instructions during runtime. The project supports a broad range of web platform capabilities, including media playback, vector graphics rendering, and advanced style sheet processing. It incorporates automated memory management through reference counting and garbage collection to ensure long-term stability. Comprehensive documentation is available to assist with building the application, configuring development environments, and extending the internal rendering pipeline.