Right single core against single core,the best scenario for Redis, and Anna's an order of magnitude faster. I'm not sure what you don't find impressive about this.
See my earlier note, it is a bit apples to oranges. Redis is not optimized for throughput on a machine, it is optimized for throughput on a single core. And that property allows lots of interesting things due not having any parallelism.
They are different tools and they have different performance characteristics. My only point was that comparing against Redis is somewhat misguided due to those differing goals.