These benchmark posts are good but they are a bit unsatisfying, I wish they’d spend more time a laying out the fundamental differences of each technology and the trade offs that are the result of how the different systems are built.<p>At the end of the day an engineer shouldn’t pick database because it’s the fastest but because it fits their use case the best.<p>I get that reddis, memcached, and keydb are all roughly in memory hashmaps but beyond that knowing what makes them different, how hard are they to operate, what they are good at and bad at is going to be more helpful in selecting which technology to use than a simple throughout benchmark.