Boost your JavaScript app

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" summary

Claim: WebAssembly runs compute‑heavy code near native speed — the C++→wasm prime‑number example measures about 20% slower than native. Toolchain is concrete: Emscripten (emcc) using LLVM, producing .wasm plus generated JS/HTML and served with emrun. Demonstrations compile C++ Fibonacci and prime routines, export calls via Module.ccall / EXPORTED_RUNTIME_METHODS, initialize with the runtime callback, and actually return correct results while wasm binaries get cached (IndexedDB) and show the version in their header.

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" chapters (4)

1. 0:00Start
2. 5:10Execution of JavaScript inside the Web Browser
3. 7:19The execution time of WASM binaries is just 20% slower than the execution of same native code.
4. 7:46WebAssembly Native Bytecode for the Web

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