Slow is relative, but you might want to check out Garnet [0] for ideas. Previous discussion at [1], current compatibility at [2].

[0] https://www.microsoft.com/en-us/research/blog/introducing-ga...

[1] https://news.ycombinator.com/item?id=39752504

[2] https://microsoft.github.io/garnet/docs/commands/api-compati...