[keycloak-user] Performance decrease after upgrade

Hi, we're running nightly stress tests against our keycloak dev environment, to monitor maximum throughput rates and average response times of selected endpoints. After upgrading from KC 3.4.3 to 4.8.3, we noticed considerable dents in our curves. For example: Userinfo dropped from ~12k max. Requests per sec to ~7k; response times increased from ~30ms to 45ms Code flow (3 correlated requests): 1.5k -> 1k max. Requests per sec; 100ms -> 150ms response time Password Credentials Grant: 800 -> 600 max. Requests per sec; 300ms -> 500ms response time We have another system running KC 4.5.0, which does not seem to suffer from that performance decrease, so it was probably introduced with > 4.5. Are there any known developments that might be the reason for our observations? Thanks, Mario.