5M Concurrent WebSockets

What it does

This article describes oatpp benchmark for 5 Million fully-loaded concurrent websocket connections. This benchmark is aimed to determine scalability of oatpp with increase of load and computing powers with respect to previous 2-million WebSockets benchmark . Server application listens to 400 ports from 8000 to 8399 (in order to prevent ephemeral ports exhaustion on the client - as we running all 4M clients on the same machine). Once there is a message on WebSocket, server will echo client's message adding "Hello from oatpp!" at the beginning. Client application opens 10k connections on each port, waits all connections are ready (all WebSocket handshakes are done) then starts the load. Each…from oatpp.io

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