Using OS threads total time 13 seconds

Start time Tue Sep 30 15:29:00 2014
Request 859 sent time Tue Sep 30 15:29:01 2014		#thread 1
Request 532 sent time Tue Sep 30 15:29:01 2014		#thread2	
Request 906 sent time Tue Sep 30 15:29:02 2014		#thread3
Response 859 receive time Tue Sep 30 15:29:03 2014	#thread 1 response
Request 155 sent time Tue Sep 30 15:29:03 2014
Response 532 receive time Tue Sep 30 15:29:03 2014	#thread 2 response
Request 232 sent time Tue Sep 30 15:29:04 2014
Response 906 receive time Tue Sep 30 15:29:04 2014	#thread 3 response
Request 870 sent time Tue Sep 30 15:29:04 2014
Response 870 receive time Tue Sep 30 15:29:06 2014
Request 570 sent time Tue Sep 30 15:29:06 2014
Response 232 receive time Tue Sep 30 15:29:07 2014
Response 155 receive time Tue Sep 30 15:29:07 2014
Request 461 sent time Tue Sep 30 15:29:07 2014
Response 570 receive time Tue Sep 30 15:29:09 2014
Request 585 sent time Tue Sep 30 15:29:09 2014
Response 585 receive time Tue Sep 30 15:29:10 2014
Response 461 receive time Tue Sep 30 15:29:10 2014
Request 479 sent time Tue Sep 30 15:29:10 2014
Response 479 receive time Tue Sep 30 15:29:13 2014

Using Coro's total time 31 sec
Coros 
Start time Tue Sep 30 16:03:53 2014
Request 812 sent time Tue Sep 30 16:03:53 2014		#thread1
Request 923 sent time Tue Sep 30 16:03:54 2014		#thread2
Request 942 sent time Tue Sep 30 16:03:57 2014		#thread3
Response 812 receive time Tue Sep 30 16:03:59 2014	#thread1 response
Response 923 receive time Tue Sep 30 16:04:00 2014	#thread2 response
Response 942 receive time Tue Sep 30 16:04:01 2014	#thread3 response
# individual threads starting sub threads async 
Request 312 sent time Tue Sep 30 16:04:01 2014
Request 607 sent time Tue Sep 30 16:04:02 2014
Request 578 sent time Tue Sep 30 16:04:03 2014
Request 675 sent time Tue Sep 30 16:04:04 2014
Request 310 sent time Tue Sep 30 16:04:05 2014
Request 720 sent time Tue Sep 30 16:04:06 2014
Request 502 sent time Tue Sep 30 16:04:07 2014
Request 867 sent time Tue Sep 30 16:04:08 2014
Response 312 receive time Tue Sep 30 16:04:11 2014
Response 607 receive time Tue Sep 30 16:04:13 2014
Response 578 receive time Tue Sep 30 16:04:16 2014
Response 675 receive time Tue Sep 30 16:04:18 2014
Response 310 receive time Tue Sep 30 16:04:21 2014
Response 720 receive time Tue Sep 30 16:04:22 2014
Response 502 receive time Tue Sep 30 16:04:24 2014
Response 867 receive time Tue Sep 30 16:04:26 2014