sources across the cluster.</li><li><strong>Traffic breaking</strong> - Traffic capture and HTTP processing, as typically done by Istio’s sidecars, is computationally expensive and can break some applications with non-conformant HTTP implementations.</li></ul><p>While sidecars have their place — more on that later — we think there is a need for a less invasive and easier option that will be a better fit for many service mesh users.</p><h2 id=slicing-the-layers>Slicing the layers</h2><p>Traditionally, 