How to Improve Go 1.27 gRPC Service Latency by 25% with eBPF 1.0 and Cilium 1.16 Sidecar Removal Modern cloud-native gRPC services often face latency overhead from sidecar proxies like Envoy, which add network hops, context switching, and processing delays. For Go-based gRPC services, even minor latency gains can improve user experience and reduce infrastructure costs. This guide walks through combining Go 1.27’s gRPC optimizations, eBPF 1.0’s kernel-level traffic management, and Cilium 1.16’s sidecar removal to cut service latency by 25%. Background: gRPC Latency Pain Points gRPC’s HTTP/2-based transport is efficient by design, but sidecar-based service meshes introduce unavoidable overhead: each request traverses the pod’s network stack twice (app → sidecar → node, or app → sidecar → peer sidecar → app), adding 10–20ms of latency per hop in typical Kubernetes environments.…