Comment 7 for bug 1324102

FYI,
Reversion of https://review.openstack.org/#/c/97569/ killed performance for this test, roughly doubling the time for the create-stack request to respond (note timings include the stack-list done by the cli).

ubuntu@wcadevstack01:~/heat_tests$ source start_4_stacks.sh
+--------------------------------------+------------+--------------------+----------------------+
| id | stack_name | stack_status | creation_time |
+--------------------------------------+------------+--------------------+----------------------+
| 47bf4447-86bf-4a58-ad63-2879caf67b3f | T10VMs_01 | CREATE_IN_PROGRESS | 2014-06-17T15:32:08Z |
+--------------------------------------+------------+--------------------+----------------------+

real 0m10.257s
user 0m0.308s
sys 0m0.112s
+--------------------------------------+------------+--------------------+----------------------+
| id | stack_name | stack_status | creation_time |
+--------------------------------------+------------+--------------------+----------------------+
| 47bf4447-86bf-4a58-ad63-2879caf67b3f | T10VMs_01 | CREATE_IN_PROGRESS | 2014-06-17T15:32:08Z |
| 501ba918-1126-4e92-af21-0544c3475076 | T10VMs_02 | CREATE_IN_PROGRESS | 2014-06-17T15:32:20Z |
+--------------------------------------+------------+--------------------+----------------------+

real 0m11.754s
user 0m0.356s
sys 0m0.072s

vs with https://review.openstack.org/#/c/97569/ reapplied

ubuntu@wcadevstack01:~/heat_tests$ source start_4_stacks.sh
+--------------------------------------+------------+--------------------+----------------------+
| id | stack_name | stack_status | creation_time |
+--------------------------------------+------------+--------------------+----------------------+
| 67d37630-a6a0-46b3-9b97-0d4603211575 | T10VMs_01 | CREATE_IN_PROGRESS | 2014-06-17T15:55:03Z |
+--------------------------------------+------------+--------------------+----------------------+

real 0m4.452s
user 0m0.320s
sys 0m0.120s
+--------------------------------------+------------+--------------------+----------------------+
| id | stack_name | stack_status | creation_time |
+--------------------------------------+------------+--------------------+----------------------+
| 67d37630-a6a0-46b3-9b97-0d4603211575 | T10VMs_01 | CREATE_IN_PROGRESS | 2014-06-17T15:55:03Z |
| f07dc5fd-27b3-4271-99a4-187b2f04d248 | T10VMs_02 | CREATE_IN_PROGRESS | 2014-06-17T15:55:07Z |
+--------------------------------------+------------+--------------------+----------------------+

real 0m4.075s
user 0m0.332s
sys 0m0.088s