Writing · Nº 041065 essays
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Clear filtersEngineeringHow Many WebSocket Connections Fit on One Server?Concurrent WebSocket connections per server are bound by memory and fan-out, not CPU. Learn the capacity math to size real-time infrastructure before you scale out.EngineeringPush Notifications Don't Need a WebSocketReal-time push notifications rarely need a persistent WebSocket. Learn when native push and fan-out beat holding a socket open, and when a socket actually earns its cost.EngineeringMultiplayer Games Need an Authoritative Server, Not Peer SyncReal-time multiplayer game state needs an authoritative server tick, not peer-to-peer sync. Learn why the server owns truth and clients only predict and reconcile.EngineeringHow to Build a Presence System That Feels LiveA presence system tracks who is online in real time. Here is what building presence actually requires, why it is harder than it looks, and how to keep it accurate.EngineeringHow to Scale WebSockets Without It Falling OverScaling WebSockets breaks most backends because connections are stateful. Here is how to scale WebSocket infrastructure past one node without losing sessions.EngineeringTrading Feeds Need Conflation, Not Every TickA real-time market data feed should conflate ticks, not push every one. Learn why conflation, not raw throughput, is the right design for a trading dashboard.EngineeringLive Sports Scores Are a Fan-Out Problem, Not a Chat ProblemReal-time live sports scores scale by fan-out, not bidirectional chat. Learn why one authoritative source and read-only broadcast is the right backend shape.EngineeringWebSockets vs Polling for Real-Time AppsWebSockets vs polling is the first real-time backend decision you make. Here is when each one wins, the hidden costs, and how to avoid picking wrong.