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+# Face Benchmark
+
+**face-benchmark** is a program to test the performance of the face system. It runs
+on a node between n consumer nodes and n producer nodes. It creates a left face and
+a right face for each pair of consumer node and producer node respectively. The left
+and right faces in each pair are tied to each other at the Interest/Data/Nack layer,
+which means that anything received on the left face is sent to the corresponding
+right face, and anything received on the right face is sent to the corresponding
+left face. The program passively waits for an incoming connection from one side which
+triggers an outgoing connection to the other side. The FacePersistency is set to
+"on-demand" for all incoming faces, and "persistent" for all outgoing faces.
+
+The FaceUris for each face pair can be configured via a configuration file. Each
+line of the configuration file consists of a left FaceUri and a right FaceUri
+separated by a space. FaceUri schemes "tcp4" and "udp4" are supported. The left face
+and right face are allowed to have different FaceUri schemes. All FaceUris MUST be
+in canonical form.
+
+Usage example:
+
+1. Configure FaceUris in `face-benchmark.conf`
+2. On the router node, run `./face-benchmark face-benchmark.conf`
+3. Run NFD on the consumer/producer node pairs