Engineering deep-dives, Ethereum notes and lessons from shipping real products. New posts regularly.
Shopify took Shop native in 12 weeks with AI and the FUD is high. So let's skip the takes and open the hood: how React Native actually works, the taxes you pay for it, and where native genuinely wins.
Part 10, the finale. We build a miniature Fiber reconciler from scratch — elements, fibers, hooks, and commits — and watch nine parts of theory click into place.
Part 9 of the internals series. Why Reanimated worklets run on the UI thread, how shared values skip the bridge, and what makes gestures feel instant.
Part 8 of the internals series. Bytecode vs JIT, garbage collection, and a field guide to measuring (then cutting) mobile startup time.
Series • 11 parts
React & React Native Internals
Going Deep: React and React Native Internals — through Build Your Own Reconciler: The Series Finale
Part 7 of the internals series. Shared memory via JSI, lazily-loaded TurboModules, and the Fabric renderer — how the new architecture kills all three bridge bottlenecks.
Part 6 of the internals series. How the legacy bridge worked, the three bottlenecks that killed it, and the ideas behind its replacement.
