Is your feature request related to a problem? Please describe.

#14 increase performance by moving from pull to push model for policy data, allowing to increase throughput. there could be as well other optimization possible, and they should be explored.

Describe the solution you'd like

These readings may offer some hints for improving:

• https://www.solo.io/blog/performance-tuning-for-extauth-using-opa/
• https://www.fugue.co/blog/performance-in-opa-rego-bottom-up-and-top-down
• https://www.openpolicyagent.org/docs/latest/envoy-performance/
• https://www.openpolicyagent.org/docs/latest/policy-performance/
• rego policy has poor performance open-policy-agent/opa#2281

Describe alternatives you've considered

Be happy with current numbers :)

Additional context
Add any other context or screenshots about the feature request here.