engine: more performance improvements

engine/mac_resolver_stub.go

@@ -3,7 +3,10 @@
 
 package engine
 
-import "net"
+import (
+	"context"
+	"net"
+)
 
 type sourceMACResolver struct{}
 
@@ -15,3 +18,7 @@ func (r *sourceMACResolver) Resolve(ip net.IP) net.HardwareAddr {
 	_ = ip
 	return nil
 }
+
+func (r *sourceMACResolver) Run(ctx context.Context) {
+	<-ctx.Done()
+}