DoorDash cuts redundant calls with 1.5M‑RPS Envoy proxy cache
DoorDash built Entity Cache, a transparent Envoy‑based proxy that caches gRPC/HTTP responses in Valkey, handling 1.5 million requests per second with seven‑nine availability. By eliminating duplicate service‑to‑service calls, it reduces latency, cuts upstream load, and improves reliability across DoorDash’s microservice mesh.