WebAssembly combined with Web Workers prevents UI freezes by offloading heavy computations to background threads. The tutorial demonstrates building a Fibonacci calculator using C compiled to WebAssembly via Emscripten, running calculations in a Web Worker to keep the main thread responsive. While JavaScript is faster for small
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Build Wasm calculation logic in CEmscripten: C to WasmWeb WorkersPutting it all togetherBringing it to the browserResultsSort: