Understanding How WebAssembly Works
Explore how WebAssembly runs within a JavaScript engine by comparing its binary decode, compile, and execute phases with JavaScript's parse, interpret, and optimize stages. Learn why WebAssembly often performs faster due to its precompiled binary format and streaming compilation, while understanding cases where JavaScript may still be advantageous.
Let’s first explore how JavaScript and WebAssembly are executed inside the JavaScript engine.
Understanding JavaScript execution inside the JavaScript engine
The JavaScript engine first fetches the complete JavaScript file (the engine has to wait until the entire file is downloaded/loaded).
Note: The bigger the JavaScript file, the longer it takes to load. It doesn’t matter how fast your JavaScript engine is or how ...