Diagnosing State Synchronization Lag in Reflex Applications
Learn how to diagnose and fix UI lag and state synchronization issues in Reflex by analyzing WebSocket traffic and optimizing state serialization.
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Reflex WebSocket State Delta Batching Limit
Reflex synchronizes frontend UI state with a backend Python State class through a persistent websocket connection managed by FastAPI and Next.js. Event handlers modify backend state, triggering delta serialization and transmission to the browser, where updates trigger reactive re-renders. The framework currently lacks a built-in configuration point to limit
reflexReflex State Updates: Transitioning to Asynchronous Event Handlers for Concurrent State Modification
Reflex utilizes a reactive state-based architecture where frontend interactions trigger event handlers on a FastAPI backend via WebSockets. To prevent backend blocking during I/O-bound operations, the framework supports asynchronous event handlers ( async def ), allowing the event loop to remain responsive. While async handlers prevent the server from freezi
fastapiReflex hot-reloading: async state loss during preserve_state
State Persistence in Hot-Reloading Reflex allows developers to maintain component state across code changes using the preserve_state flag. While this ensures synchronous state values remain intact when the binary recompiles and the UI re-instantiates, the behavior of asynchronous operations during this transition is less clear. When a reload is triggered whi