this one might fit the description as well: Rax is a radix tree implementation initially written to be used in a specific place of Redis in order to solve a pe

this one might fit the description as well: Rax is a radix tree implementation initially written to be used in a specific place of Redis in order to solve a performance problem, but immediately converted into a stand alone project to make it reusable for Redis itself, outside the initial intended application, and for other projects as well. https://github.com/antirez/rax https://github.com/antirez/rax