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c436e0366c
Three improvements to the socket event emitter hot path (when realtime chat save is enabled): 1. Wrap all synchronous Chats.* DB calls in asyncio.to_thread() to avoid blocking the event loop during streaming. With N concurrent users, sync DB calls serialize all writes and block socket event delivery. 2. Only persist final (done=True) status events to DB. Intermediate statuses (tool calling progress, web search progress, etc.) are ephemeral UI-only data already delivered via socket — writing every one to DB is unnecessary I/O. 3. Convert if/if/if chain to if/elif since event types are mutually exclusive, avoiding unnecessary string comparisons after a match.