Adding instructions to run the benchmarks

- Note that these tests don't test RPC, only data format

benchmark/bin/README.md

@@ -0,0 +1,13 @@
+# Benchmarks
+
+You'll need to install the protobuf dependencies if you want to profile against protobufs.
+
+```bash
+pip install -r requirements.txt
+```
+
+To run all the benchmarks:
+
+```bash
+./run_all -l pyproto -l pyproto_cpp
+```

benchmark/bin/requirements.txt

@@ -0,0 +1 @@
+protobuf