Inside Fiber: the In-Depth Overview You Wanted a TLDR for – Matheus Albuquerque, React Summit 2022

Discover the intricate workings of React's fiber architecture, from its call stack models to its effect handlers. Learn how fibers enhance performance and responsiveness, making React a powerful tool for building dynamic UIs.

Key takeaways
  • Fibers are React-specific call stack models that represent components.
  • A fiber is a stack frame for a given React component.
  • Fibers allow for cooperative execution in low-level handling.
  • Fibers can pause reconciliation at any depth of a component’s tree.
  • Fibers can be visualized and manipulated.
  • Q-routines are generators that can consume and produce values.
  • Q-routines can be used to implement effect handlers in React.
  • Effect handlers allow for handling side effects inside a component.
  • React’s source code is complex and contains a lot of metadata about components.
  • React uses tags to identify different types of components.
  • React’s scheduler determines what runs next and can pause and resume tasks.
  • React’s layouting algorithm has been rewritten to use fibers.
  • React’s use of fibers has improved performance and made it more responsive.