+.. option:: --output-format=type
+
+ Set the reporting format to `normal`, `terse`, `json`, or `json+`. Multiple
+ formats can be selected, separated by a comma. `terse` is a CSV based
+ format. `json+` is like `json`, except it adds a full dump of the latency
+ buckets.
+
+.. option:: --runtime
+ Limit run time to runtime seconds.
+