PKPRINCE KUMARinprincekumar-engineer.hashnode.dev·Aug 30 · 22 min readRealtime Systems: Polling, WebSocket, SSE, and Pub/SubHow does WhatsApp deliver a message instantly? You send a message to a friend. Within a fraction of a second, their phone shows a notification. There is no refresh button. You do not repeatedly ask t00
ATAceRank Teaminacerank.hashnode.dev·Aug 26 · 4 min readAdaptive live-sports polling under a fixed API quotaHow AceRank keeps live tennis scores and derived standings fresh while directing a finite request budget toward the matches most likely to change. By AceRank Editorial Team I operate AceRank, a free u00
VPVed Pandeyinvedpandeydev.hashnode.dev·Aug 21 · 12 min readBeyond Refresh: Realtime SystemHow does WhatsApp deliver a message instantly? You send a message, and it your friend's receives that in a fraction of second. No refresh, no waiting. Somehow, the app "knows" the moment new data show10
SSUPRABHATinblog.suprabhat.site·Aug 12 · 10 min readRealtime Systems: Polling, WebSockets, SSE, and Pub/SubImagine Suprabhat sends a message to a friend. Within a fraction of a second, the message appears on the other person’s phone. No refresh button. No waiting. No manually checking the server again and 31T
KSKanishka Shashiinhtml-dev09.hashnode.dev·Jul 7 · 17 min readRealtime Systems: Polling, WebSockets, SSE, and Pub/SubThe question that started it all How does WhatsApp deliver a message instantly? You send a message, and it appears on your friend's phone within a fraction of a second — no refresh button, no waiting.10
OPOm Pednekarinompednekar.hashnode.dev·Jun 26 · 10 min readBuilding a Real-Time Speech-to-Text Pipeline: WebSockets, VAD, and BackpressureMost speech-to-text demos you see online work the same way: record audio, send the whole file, wait for a response. That's fine for a voice memo transcriber. It falls apart the moment you want live ca00
KNKeerthika Ninkees-learnings.hashnode.dev·Jun 22 · 2 min readShort polling, Long polling, and Server-side eventsIn this blog, I am going to share my understanding of short polling, long polling and server-side events which I learnt in my system design classes. Polling Polling refers to the process of communicat00
YYYogesh Yadavincodescoop.hashnode.dev·May 3 · 11 min readReal-Time on the Frontend - SSE, WebSockets & PollingIn this article we'll cover when polling is actually the right answer, why SSE is the most underrated real-time technology on the web, when WebSockets are genuinely worth the complexity, how to handle20
SOSteven Olseninsrjsdev.hashnode.dev·Apr 14 · 8 min readHow I Used AI to Build YouTube Quizr - Part ThreeBy the time I finished the core quiz pipeline (part 2), I had a new problem. Actually, I had a very old problem wearing a new hat: long-running asynchronous work. Once you stop doing one prompt and st00
Aampheoinampheoelectronic.hashnode.dev·Sep 23, 2025 · 3 min readDoes polling generate heat in microcontrollers?Polling does generate heat in microcontrollers, but usually only significantly under specific conditions. Here's a detailed explanation: Why Polling Can Generate Heat 1. Constant High CPU Utilization c // Example: Intensive Polling Loop while(1) { ...00
