Add benchmarks for speedups (#473)

* Add benchmarks for speedups

* Update README.md

* Update README.md

Co-authored-by: Teemu R. <tpr@iki.fi>

* relo

* Update README.md

* document benchmark

* Update README.md

---------

Co-authored-by: Teemu R. <tpr@iki.fi>

devtools/bench/benchmark.py

@@ -0,0 +1,30 @@
+"""Benchmark the new parser against the old parser."""
+
+import json
+import timeit
+
+import orjson
+from kasa_crypt import decrypt, encrypt
+from utils.data import REQUEST, WIRE_RESPONSE
+from utils.original import OriginalTPLinkSmartHomeProtocol
+
+
+def original_request_response() -> None:
+    """Benchmark the original parser."""
+    OriginalTPLinkSmartHomeProtocol.encrypt(json.dumps(REQUEST))
+    json.loads(OriginalTPLinkSmartHomeProtocol.decrypt(WIRE_RESPONSE[4:]))
+
+
+def new_request_response() -> None:
+    """Benchmark the new parser."""
+    encrypt(orjson.dumps(REQUEST).decode())
+    orjson.loads(decrypt(WIRE_RESPONSE[4:]))
+
+
+count = 100000
+
+time = timeit.Timer(new_request_response).timeit(count)
+print(f"New parser, parsing {count} messages took {time} seconds")
+
+time = timeit.Timer(original_request_response).timeit(count)
+print(f"Old parser, parsing {count} messages took {time} seconds")