One post tagged with "websocket"

QuizShip is a live quiz platform. A teacher hosts a game, students join from their phones, and a Go server sends each question to every player over a WebSocket. A Python API handles accounts, billing and the teacher's dashboard. Both run on Kubernetes.

I wanted to know where QuizShip breaks before real traffic showed me, so I copied production into an isolated environment and ran six k6 tests against it. Claude Code helped me design the tests and analyze the data. This post covers what load testing is and how I wrote the tests in k6, including WebSocket tests that hold 30,000 connections. Then it goes through what each test showed, the mistakes I made, and what that load costs on AWS.