Learn WASMTIME with Real Code Examples

Run a Rust CLI tool compiled to Wasm

Embed Wasm plugin engine in a Rust service

Edge compute engine for user-defined code

Secure sandbox for untrusted extensions

Polyglot backend sharing libraries via Wasm

Check WASI version compatibility

Verify target triple: wasm32-wasi

Ensure imports/exports match host code

Enable debug logs to inspect traps

Use `wasmtime inspect` for metadata

Use Wasmtime test harness

WASI snapshot tests

Benchmarks using `wasmtime bench`

Stress test memory limits

Fuzz Wasm modules

CLI execution

Embedded in server apps

Serverless compute environments

Container-like Wasm deployments

Edge and IoT devices

Cranelift compiler backend

WASI Preview 1/2 runtimes

Wasmtime CLI

Wasmtime language SDKs

WIT bindgen & component model tooling

Rust (first-class)

Go, Python, C#, Ruby, Java

Node.js embedding

Cloud serverless platforms

Edge networks (Fastly Compute@Edge)

Use Rust for first-class tooling

Prefer WASI APIs for portability

Use AOT for minimal latency

Adopt component model early

Keep modules modular and stateless

WASI still evolving

Host bindings require careful type mapping

Debugging traps can be tricky

Memory management requires discipline

AOT vs JIT trade-offs