Updating protos to gogoprotobuf with fewer allocs and reflection.

protos/Makefile

@@ -0,0 +1,24 @@
+#
+#  Copyright 2018 Dgraph Labs, Inc.
+#
+#  This file is available under the Apache License, Version 2.0,
+#  with the Commons Clause restriction.
+#
+
+PROTO_PATH := ${GOPATH}/src:.
+PROTO_PATH := ${PROTO_PATH}:${GOPATH}/src/github.com/gogo/protobuf
+PROTO_PATH := ${PROTO_PATH}:${GOPATH}/src/github.com/dgraph-io/dgo/protos
+
+.PHONY: help
+help:
+	@echo Use \"make regenerate\" to proceed.
+
+clean:
+	@mkdir -p pb && rm -f pb/pb.pb.go
+
+regenerate: clean
+	@protoc \
+		--proto_path=${PROTO_PATH} \
+		--gogofaster_out=plugins=grpc,Mapi.proto=github.com/dgraph-io/dgo/protos/api:pb \
+		pb.proto
+	@echo Done.

protos/pb.proto

@@ -24,8 +24,14 @@ syntax = "proto3";
 
 package pb;
 
+import "gogoproto/gogo.proto";
 import "api.proto";
 
+option (gogoproto.marshaler_all) = true;
+option (gogoproto.sizer_all) = true;
+option (gogoproto.unmarshaler_all) = true;
+option (gogoproto.goproto_getters_all) = true;
+
 message List {
 	repeated fixed64 uids = 1;
 }