Updated readme

README.md

@@ -44,4 +44,38 @@ Msg time mean mean (ms):     140.751
 Msg time mean std (ms):      13.695
 Average Bandwidth (msg/sec): 6.761
 Total Bandwidth (msg/sec):   676.112
+```
+
+Similarly, in JSON:
+
+```
+> mqtt-benchmark --broker tcp://broker.local:1883 --count 100 --size 100 --clients 100 --qos 2 --format json
+{
+    runs: [
+        ...
+        {
+            "id": 61,
+            "successes": 100,
+            "failures": 0,
+            "run_time": 16.142762197,
+            "msg_tim_min": 12.798859,
+            "msg_time_max": 1273.9553740000001,
+            "msg_time_mean": 147.66799521,
+            "msg_time_std": 152.08244221156286,
+            "msgs_per_sec": 6.194726700402251
+        }
+    ],
+    "totals": {
+        "successes": 10000,
+        "failures": 0,
+        "total_run_time": 16.153741746,
+        "avg_run_time": 15.14702422494,
+        "msg_time_min": 7.852086000000001,
+        "msg_time_max": 1285.241845,
+        "msg_time_mean_avg": 136.4360292677,
+        "msg_time_mean_std": 12.816965054355633,
+        "total_msgs_per_sec": 681.0374046459865,
+        "avg_msgs_per_sec": 6.810374046459865
+    }
+}
 ```