Comparison
Comparison matrix
Section titled “Comparison matrix”| Capability | Runtime availability | Isolation potential | Integration complexity | Best fit | Support status |
|---|---|---|---|---|---|
BroadcastChannel | 🟢 (modern browsers) | 🟡 (context-scoped, not a security boundary) | 🟡 | Multi-tab/window diagnostics and observer tooling | Experimental, no full support guarantee |
SES/ShadowRealm | 🟡 (platform/tooling dependent) | 🟢 (capability-oriented sandbox model) | 🔴 | High-control runtime research and pilot integrations | Experimental, no full support guarantee |
WASM Sandbox | 🟡 (depends on sandbox stack) | 🟢 (strong guest-host boundary potential) | 🔴 | Advanced platform R&D and controlled execution models | Experimental, no full support guarantee |
Legend:
Integration complexity:🟢low,🟡medium,🔴high.Runtime availabilityandIsolation potential:🟢stronger default posture,🟡context-dependent.- Experimental rows indicate capability potential, not baseline support commitments.
Recommended usage posture
Section titled “Recommended usage posture”- Validate adapter behavior in controlled testbeds first.
- Preserve fallback paths to baseline transports.
- Promote to production only after explicit protocol and lifecycle validation.