SMRTR ProgrammingFeb 8, 2026Daily.dev

How WebAssembly and Web Workers prevent UI freezes

SMRTR summary

This tutorial demonstrates building a high-performance Fibonacci calculator using WebAssembly and Web Workers to prevent UI freezing during intensive computations. It walks through setting up Emscripten SDK, compiling C code to Wasm, and implementing the calculator in a background thread. While JavaScript performs better for small calculations, WebAssembly shines for heavy computations while maintaining UI responsiveness.

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