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| Metric | Bun | Cloudflare Workers | Firecracker |
|---|---|---|---|
| Score | B+76 | B+75 | B70 |
| Type | Language | Edge | MicroVM |
| Execution | jit | jit | aot |
| Interface | cli | platform | api |
| Cold Start | 3ms | <1ms | 125ms |
| Memory | 25MB | 128MB | 5MB |
| Startup | 1ms | <1ms | 100ms |
| Isolation | process | process | microvm |
| Maturity | stable | production | production |
| Languages | JavaScript, TypeScript, JSX, TSX | JavaScript, TypeScript, Rust, C, C++ | Any |
| License | MIT | Proprietary | Apache-2.0 |
| Links |