Hello! This article is serverely stale info. Modern versions of Redis with lexicographic ranges can do much better. Please check the following: https://redis.io

Hello! This article is serverely stale info. Modern versions of Redis with lexicographic ranges can do much better. Please check the following: https://redis.io/topics/indexes https://redis.io/topics/indexes Also you may want to check the RediSearch module from Redis Labs. It's AGPL and not part of the Redis project itself but it's very powerful. http://redisearch.io http://redisearch.io BTW using vanilla Redis with lexicographic ranges some time ago I published a demo where I indexed the whole Linux kernel code using a small amount of memory and performing many tens of thousands ranges per second. There are other systems out there that are designed just for search but in certain low latency cases Redis can be hard to beat, also if you want to change the index in real time.