ction, Istio has used significantly more CPU only in the egress gateway + SNI proxy case.</p><h2 id=conclusion>Conclusion</h2><p>In this investigation, we tried different options to access an external TLS-enabled MongoDB to compare their performance. The introduction of the Egress Gateway did not have a significant impact on the performance nor meaningful additional CPU consumption. Only when enabling mutual TLS between sidecars and egress gateway or using an additional SNI proxy for wildcarded domains we c