Rate limiters are used to protect servers from overload and to prevent attackers--or even legitimate but unintentionally greedy tenants--from starving other tenants of resources. They are a key component of a resilient distributed system.

See, e.g., https://docs.aws.amazon.com/wellarchitected/latest/framework...

This project, however, looks like a concurrency limiter, not a rate limiter. I'm also not sure how it works across a load-balanced cluster.