Programming Tutorials

  The Hook You’ve ported your CPU-intensive logic to Rust. You’ve compiled it to WebAssembly using  wasm-bindgen . You expect a 10x performance boost, but your benchmarks show that the application is barely faster—or perhaps even slower—than the vanilla JavaScript implementation. The bottleneck is rarely the computation inside the Wasm module; it is the bridge you cross to get there. When developers naively pass large datasets (like image buffers, 3D mesh arrays, or heavy JSON objects) between JavaScript and Rust, they unknowingly trigger expensive serialization and deserialization routines. This O(n) copy operation consumes the very CPU cycles you were trying to save. To unlock the true performance of WebAssembly, you must stop copying data and start sharing memory. The Why: The Serialization Tax JavaScript and WebAssembly run in the same thread but exist in different memory worlds. JavaScript Heap:  Managed by the JS engine (V8, SpiderMonkey) with Garbage Collection. Wa...