C1000K-Servers

C1000K-Servers is a benchmark and prototype collection for high-performance WebSocket servers. It compares implementations built with frameworks and runtimes such as Spray, Netty, Undertow, Jetty, Vert.x, Grizzly, Node.js, Go, and Go-fasthttp. The project focuses on large-scale long-lived WebSocket connections and documents tests reaching more than one million active connections. It includes simple server prototypes that can act as scaffolds for chat, message pushing, notification, or real-time delivery systems. The repository also provides deployment and tuning guidance for servers, clients, memory settings, file descriptor limits, and multiple test IPs. It is useful for engineers evaluating WebSocket stack behavior under extreme connection pressure.