Fastbin is a drop in replacement of pycasbin the python implementation of the great authorization management casbin.
Fastbin is designed to address the primary concern when working with large sets of rules; Performance.
The root cause of working with large rule sets is the following: casbin/core_enforcer.py#L238
Iterating over 10,000 rules to get a yes or no answer takes time, there really isn't a way around the fact. This limitation comes from the generalization that casbin attempts to support. Independent on the format of your request, or policy definition casbin if able to support your authorization mechanism.
Fastbin makes a minimal set of assumptions to allow efficient filtering of the model so that the number of rules you are iterating over to get a result is much smaller and performance can be maintained. Using Fastbin when working with rule sets of any size, it is possible to keep resolution of enforcement sub millisecond.
Casbin is a powerful and efficient open-source access control library that supports various access control models for enforcing authorization across the board.
Enforcing a set of rules is as simple as listing subjects, objects, and the desired allowed action (or any other format as per your needs) in a policy file. This is synonymous across all flows in which Casbin is used. The developer/administrator has complete control over the layout, execution, and conditions for authorization, which are set via the model file. Casbin provides an Enforcer for validating an incoming request based on the policy and model files given to the Enforcer.
