— Next.js architecture, Pages Router and App Router internals, Flight Protocol, the server layer, Turbopack builds, caching and Server Actions.
— Chromium's multi-process architecture, the rendering pipeline, GPU work, React Fiber, and alternative rendering paths from Canvas to WebGL.
— How V8 compiles JavaScript, manages memory and optimizes code through bytecode, Ignition, TurboFan, hidden classes and garbage collection.
— Six event loop phases, libuv, thread pool, multithreading and profiling explained with code examples.