Explore the Fibers extension in PHP 8.1 through this 41-minute conference talk from the International PHP Conference. Discover how this core feature aims to solve concurrent execution challenges and compare it to async frameworks like Swoole and ReactPHP. Delve into the concept of green threads, examining their advantages and disadvantages. Learn about FFI (Foreign Function Interface), its problem-solving capabilities, and limitations. Gain practical insights through code examples comparing PHP and C function definitions, and understand the power of preprocessors. Investigate DuckDB, including its introduction, bindings, and usage examples. Dive into extension development, covering prerequisites, skeleton generation, and compilation processes. Analyze performance metrics and compare different approaches to determine the most effective implementation for your projects.