Performance

Benchmark Summary

Metric	E2B	Synapse	Advantage
Cold start	~200ms	<1ms	205×
Code execution	~50ms	0.24ms	208×
File write	~30ms	0.1ms	300×
Isolation overhead	Docker (~50MB)	Wasm (~2MB)	25× less memory

Why So Fast?

Synapse uses Wasm isolation instead of Docker containers:

1. No container boot — Wasm modules instantiate in microseconds
2. No filesystem overlay — Direct memory-mapped I/O
3. No network namespace — Wasm sandboxes are memory-isolated by default
4. Ahead-of-time compilation — Templates are pre-compiled to native code
5. Single binary — No orchestration overhead (no containerd, runc, or shim)

Reproducibility

Every execution is fully deterministic. Same code + same template = same result hash, every time.