If React can orchestrate an open-world 3D C++ game engine at a locked 120 FPS without dropping a single frame, it can handle your heaviest web workload. In this technical case study, we deconstruct how we ported GTA Vice City to WebAssembly and offloaded execution entirely to a background Web Worker. Learn how we bridged compiled C++ with React using SharedArrayBuffer, bypassed traditional Virtual DOM bottlenecks using ref-based micro-updates, and unlocked true off-main-thread UI architecture. You’ll leave with a battle-tested blueprint to make any React application virtually immune to thread freezing and input lag.
This talk has been presented at React Day Berlin 2026, check out the latest edition of this React Conference.


















