For sure, but the biggest overhead is usually application startup (in say Java, Dart, Node, Python, etc) where just the VM can take a few 100ms to start. Using

For sure, but the biggest overhead is usually application startup (in say Java, Dart, Node, Python, etc) where just the VM can take a few 100ms to start. Using a compiled language would most likely be the way to go for maximum performance (although it's less important if the WebSocket is long lasting)