What are the performance using a database to resolve sessions?

[Tsimopak]

In-memory obvious is the fastest solution, but what is the best alternative afterwards?
What database is optimal and what are the benchmarks if any of you guys tried? do we talk here about micro seconds or milli seconds? I afraid that for every end point request that the user do, it would add a significant amount of time.

[bjohansebas]

I really don't know if anyone has done a benchmark on this. In principle, the fastest databases would be key-value stores like Redis, although I don't have a basis to say which is the fastest solution.