multiplayer-run-sync

Real-time workout state synchronization across multiple devices uses Durable Objects and WebSockets to broadcast timers and rep counts, maintaining a consistent view of progress for all connected participants.

A monotonic fixed-timestep clock for real-time simulation provides deterministic state updates independent of system wall-clock time, ensuring smooth UI rendering and consistent workout progress tracking despite varying network conditions.

In a leader and participant model for shared workout sessions, the leader controls the authoritative workout state, while participants view the synchronized timer and optionally track their own rep counts via WebSocket connections.

Yes, you can use Durable Objects and WebSockets to broadcast group workout events. This architecture handles presence tracking and event broadcasting, allowing participants to receive real-time start and stop commands.

Workout desynchronization happens with varying network conditions when relying on wall-clock time, which is why a monotonic fixed-timestep simulation clock is required to enforce deterministic state updates and maintain consistency.