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RFC index · issued 2026-09-26
Nitro / JSI Sockets vs Pure JS WebSockets in 2026
Not financial advice. Verify claims independently.
When to stay on JS websockets — and when a native lane earns its complexity.
From the public realtime drawing set:
Pure JS WebSocket is still the right default for many fintech clients: debuggable, portable, good enough under calm tape.
Reach for Nitro / JSI native lanes when:
- You parse binary quote packs at high frequency
- You must share a socket across RN isolates
- GC pauses show up in mid-burst profiles
Decision rule
Measure under an earnings burst scenario (MU Wed AMC) before rewriting. Many teams find conflation + worker parsing enough without a native module.
Validate UX on Stock Picks paper tape either way.
Not financial advice. Verify claims independently.