Why Your WebRTC App Breaks After 3 Users (And How Zoom Fixes It)

WebRTC's peer-to-peer mesh architecture causes exponential connection growth, leading to lag, CPU spikes, and bandwidth issues beyond 3-4 users. Apps like Zoom solve this using SFU (Selective Forwarding Unit) architecture, where a central server routes media streams efficiently. Mediasoup is an open-source SFU that acts as a media router with workers, routers, transports, producers, and consumers to enable scalable real-time video.