Add open/closed workload example.

examples/open_closed_workload.py

@@ -0,0 +1,22 @@
+from locust import HttpUser, constant, constant_pacing, task
+
+
+class ClosedWorkload(HttpUser):
+    wait_time = constant(10)  # sleep 10s after each task, regardless of execution time
+
+    @task
+    def t(self):
+        pass
+
+
+class OpenWorkload(HttpUser):
+    wait_time = constant_pacing(10)  # sleep just enough so that we run one task iteration every 10s
+
+    @task
+    def t(self):
+        pass
+
+
+# Note: A test using constant_pacing is still limited by the number of Users you spawn,
+# so if response times increase to the point where one task execution takes more than 10s,
+# you still wont reach your target throughput.