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| Metric | Wasmtime | Cloudflare Workers | Python (CPython) | Firecracker | AWS Lambda | Node.js |
|---|---|---|---|---|---|---|
| Score | A88 | B+75 | B71 | B70 | B-65 | B-65 |
| Type | WebAssembly | Edge | Language | MicroVM | Serverless | Language |
| Execution | aot | jit | interpreted | aot | hybrid | jit |
| Interface | cli | platform | cli | api | platform | cli |
| Cold Start | 1ms | <1ms | 50ms | 125ms | 200ms | 50ms |
| Memory | 5MB | 128MB | 15MB | 5MB | 128MB | 40MB |
| Startup | <1ms | <1ms | 10ms | 100ms | 100ms | 20ms |
| Isolation | process | process | process | microvm | microvm | process |
| Maturity | production | production | production | production | production | production |
| Languages | Rust, C, C++, Go, Python, AssemblyScript | JavaScript, TypeScript, Rust, C, C++ | Python | Any | JavaScript, TypeScript, Python, Java, Go, Ruby, .NET, Rust | JavaScript, TypeScript |
| License | Apache-2.0 | Proprietary | Other | Apache-2.0 | Proprietary | MIT |
| Links |