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KeyDB does network I/O and parsing on separate threads, but still has one big lock around the data structures themselves. DragonflyDB does full processing of the transaction on separate threads.

[1] https://docs.keydb.dev/blog/2019/10/07/blog-post/

The benchmark graph in README.md shows KeyDB. This thing is faster according to the graphs. https://raw.githubusercontent.com/dragonflydb/dragonfly/main...

Also curious on how it compares to Aerospike.

I do not even know how to to that comparison. Redis and DF share the same protocol and the same API so it's each to compare with memtier_benchmark.