There is a difference between queries and connections. With pipelining, a redis machine can easily serve that. If they stored things in a better structure, like

There is a difference between queries and connections. With pipelining, a redis machine can easily serve that. If they stored things in a better structure, like a list, they'd easily be able to get that. On my machine 5 concurrent requests, at 100 items, it can do ~6 500 000 items per second, at 300, 11 000 000 per second, and it kind of caps out at that. Even with 1 concurrent connection, at 600 items, you get 6M per second.