WebAssembly 3.0: 64-bit Memory 16EB + GC + Multi-Memory Live กันยายน 2025

WebAssembly 3.0 Live! 64-bit Memory 16EB + Garbage Collection - เปลี่ยนเกม Developer
WebAssembly 3.0 ประกาศ standard กันยายน 2025 i64 memory (16EB), Multi-memory, GC, Typed Refs, Tail calls, Relaxed SIMD เริ่มรัน Chrome/Edge/Firefox + Wasmtime

WebAssembly 3.0 vs 2.0: Major Upgrades

Memory Revolution: i64 + Multi-Memory

🚀 32-bit → 64-bit: 4GB → 16EB theoretical
📦 Web limit: ~16GB practical
🔄 Multiple memories: Isolate data regions

Use case: Video editors, 3D renderers, databases

Garbage Collection (GC) Proposal

✅ JS/TS: V8/Deno native support
✅ Rust: no-std + GC allocators
✅ Java/Kotlin: JVM → Wasm GC
✅ Go: Experimental GC support

Syntax:

(gc: i31ref) <- (func (ref any) (result i31ref)
  struct.new $MyStruct
)

New Instructions & Performance

⚡ tail.call $func          ;; Zero stack overhead
🧮 relaxed.simd.f32x4.add  ;; Deterministic FP
🔗 typed.ref.test any $type ;; Runtime type check
📏 i64.load8_u offset=0    ;; 64-bit memory access

Perf gain: 15-30% faster large workloads

Language Support Matrix

Browser & Runtime Support 2026

🌐 Chrome 125+ : Full Wasm 3.0
🦊 Firefox 132+ : GC + Multi-mem
🟦 Edge 125+  : Complete
⚙️ Safari 19+  : Q1 2026
🦀 Wasmtime  20.0 : Production ready
🐳 Wasmer    6.0  : Docker integration

Deploy Wasm 3.0 - Quick Start

Rust + Trunk:

cargo install trunk
echo 'fn main() { println!("Wasm 3.0!"); }' > src/lib.rs
trunk build --release

GC Example (AssemblyScript):

class Point { x: f64; y: f64 }
let p = new Point();  // GC managed

Docker Wasm Runtime:

FROM wasmtime/wasmtime:v20.0
COPY app.wasm /app.wasm
CMD ["wasmtime", "/app.wasm"]

Real-world Use Cases Wasm 3.0

🎮 Game engines: Unity/Unreal → Browser
🎬 Video: FFmpeg 8K real-time
📊 Databases: SQLite + Postgres
🧮 ML: ONNX Runtime 70B models
💻 IDE: VS Code server-side

16GB apps: Photoshop, Blender, Figma clones

Wasm 3.0 vs Native/Electron