ing Kubernetes environment. Finally, we pushed the size of our AKS cluster up to 1,000 nodes on 11,000 cores, to understand how these projects perform at scale. Our results show areas where each can improve, but also indicate that Istio is the clear winner.</p><h2 id=test-scenario>Test Scenario</h2><p>In order to push Istio and Cilium to their limits, we created 500 different services, each backed by 100 pods. Each service is in a separate namespace, which also contains one <a href=https://fortio.org/>Forti