官方的性能报告：

Kamailio (OpenSER) 1.2.0 - Transaction Module and User Location Performance Tests

如下的提取的性能参数也是基于官方的性能报告，信令走的UDP，作为做系统方案的参照，Kamailio的性能还是非常，非常优秀！

All used SIP-related software was configured to use UDP as transport protocol for SIP.

场景1：注册：

UAC	--->REGISTER--->	Proxy
UAC	<---200 OK<---	Proxy

Results reported by SIPP:

Iterations	100000
Max concurent calls	100
Max allowed Rate	20000	requests per second
Average Call Rate	7692.899	requests per second
Failures	0
Retransmissions	0
Timeout	0
Elapsed Time	00:00:12:999	hour:min:sec:msec
Full screen can be found here

场景2：INVITE呼叫：

Results reported by SIPP on the UAC servers:

UAC--->INVITE--->Proxy  UAC<---100 Trying<---Proxy    Proxy--->INVITE--->UASUAC<---200 OK<---Proxy<---200 OK<---UASUAC--->ACK--->Proxy--->ACK--->UASUAC--->BYE--->Proxy--->BYE--->UASUAC<---200 OK<---Proxy<---200 OK<---UAS

UAC1 (192.168.2.100:5060)
Iterations	200000
Max concurrent calls	27
Max allowed Rate	7000	calls per second
Average Call Rate	4164.758	calls per second
Failures	0
Retransmissions	0
Timeout	0
Elapsed Time	00:00:48:022	hour:min:sec:msec
Full screen can be found here

UAC2 (192.168.2.101:5060)
Iterations	200000
Max concurrent calls	27
Max allowed Rate	7000	calls per second
Average Request Rate	3896.661	calls per second
Failures	0
Retransmissions	0
Timeout	0
Elapsed Time	00:00:51:326	hour:min:sec:msec
Full screen can be found here

场景3：Message消息：

UAC	--->MESSAGE--->	Proxy	--->MESSAGE--->	UAS
UAC	<---200 OK<---	Proxy	<---200 OK<---	UAS

Results reported by SIPP on the UAC servers:

UAC1 (192.168.2.100:5060)
Iterations	200000
Max concurrent requests	70
Max allowed Rate	10000	requests per second
Average Request Rate	8047.966	requests per second
Failures	0
Retransmissions	0
Timeout	0
Elapsed Time	00:00:24:851	hour:min:sec:msec
Full screen can be found here

UAC2 (192.168.2.101:5060)
Iterations	200000
Max concurrent requests	70
Max allowed Rate	10000	requests per second
Average Request Rate	7427.765	requests per second
Failures	0
Retransmissions	0
Timeout	0
Elapsed Time	00:00:26:926	hour:min:sec:msec
Full screen can be found here

不同线程数性能报告：

如此高的性能，搞个双机热备作为信令服务，然后媒体服务freeswitch搞个分布式，如此的可靠性的呼叫平台就非常的优秀了！