GO性能测试：未进行任何优化

srs.go中对于GO的tcp模块，以及web服务器martini做了初步的性能测试，没有做任何优化。

TCP部分

TCP部分参考：https://github.com/winlinvip/srs.go/tree/master/research/tcp

GO作为服务器

GO作为服务器
go build ./tcp.server.go && ./tcp.server 1 1990 4096 >/dev/null
g++ tcp.client.cpp -g -O0 -o tcp.client && ./tcp.client 1990 4096 >/dev/null 

----total-cpu-usage---- -dsk/total- ---net/lo-- ---paging-- ---system--
usr sys idl wai hiq siq| read  writ| recv  send|  in   out | int   csw 
  7  17  51   0   0  25|   0     0 | 680M  680M|   0     0 |2207    48k
  7  15  52   0   0  26|   0     0 | 680M  680M|   0     0 |2228    48k
  
  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND             
  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                                                       
 5415 winlin    20   0  169m 2220 1404 R 100.4  0.1   0:27.56 ./tcp.server 1990 4096                                                                                        
 5424 winlin    20   0 11648  900  764 R 85.1  0.0   0:23.47 ./tcp.client 1990 4096   

C++作为服务器

C++作为服务器
g++ tcp.server.cpp -g -O0 -o tcp.server && ./tcp.server 1990 4096 >/dev/null 
g++ tcp.client.cpp -g -O0 -o tcp.client && ./tcp.client 1990 4096 >/dev/null 

----total-cpu-usage---- -dsk/total- ---net/lo-- ---paging-- ---system--
usr sys idl wai hiq siq| read  writ| recv  send|  in   out | int   csw 
  6  25  44   0   0  24|   0   224k|2142M 2142M|   0     0 |2439    15k
  5  23  48   0   0  23|   0     0 |2028M 2028M|   0     0 |2803    10k
  
  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                                                       
 9758 winlin    20   0 11648  900  764 R 98.3  0.0   0:11.36 ./tcp.client 1990 4096                                                                                         
 9751 winlin    20   0 11648  884  752 R 71.4  0.0   0:07.85 ./tcp.server 1990 4096 

Python作为服务器

Python作为服务器
python tcp.server.py 1990 4096 >/dev/null
g++ tcp.client.cpp -g -O0 -o tcp.client && ./tcp.client 1990 4096 >/dev/null 

----total-cpu-usage---- -dsk/total- ---net/lo-- ---paging-- ---system--
usr sys idl wai hiq siq| read  writ| recv  send|  in   out | int   csw 
 11  17  44   3   0  26|   0   156k|1526M 1526M|   0     0 |2215    28k
 11  16  47   0   0  25|   0     0 |1482M 1482M|   0     0 |2189    26k

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                                                       
 5140 winlin    20   0  157m 5932 2824 R 100.0  0.3   2:36.01 python tcp.server.py 1990 4096                                                                                
 5331 winlin    20   0 11648  900  764 R 87.3  0.0   1:02.47 ./tcp.client 1990 4096        

GO直接TCP发包时，性能比c++直接发包差。python直接发tcp包表现良好。

Web部分

Web部分参考：https://github.com/winlinvip/srs.go/tree/master/research/web

1个并发测试

用ab测试了下，1并发请求时：
ab -n 100000 -c 1 http://127.0.0.1:8080/api/v3/json
openresty:   8851.97rps, 84%，  3MB，AB66%
cherrypy:     653.12rps,   98%，17MB，AB7%
go-martini:  4574.10rps,  88%，  4MB，AB35%

10个并发测试

ab -n 100000 -c 10 http://127.0.0.1:8080/api/v3/json
openresty：16550.72rps
cherrypy: 531.28rps
go-martini: 15737.50rps

50个并发测试

50个并发要开启多个ab测试了，否则客户端成为瓶颈：
for((i=0;i<5;i++)); do (ab -n 100000 -c 10 http://127.0.0.1:8080/api/v3/json >req100-$i.go.txt &); done
openresty：18514rps
go-martini: 30954rps

100个并发测试

起5进程，每个并发20个请求：
<pre name="code" class="plain">for((i=0;i<5;i++)); do (ab -n 100000 -c 20 http://127.0.0.1:8080/api/v3/json >req100-$i.go.txt &); done

openresty：29063rpsGO：43288rps

在高访问量时，go的表现比python好很多，比openresty也要好。

go的效率和c++相比是差一些，考虑到部署和多cpu的情况可能要好，服务器代码也不用写得那么难。

go目前来看达到了高效率的python的目标。在后端里面应该是可以考虑的，特别是一些api。

依赖包

Openresty的依赖包一大堆，部署不方便：

[winlin@dev6 web]$ ldd objs/_release/nginx/sbin/nginx
	linux-vdso.so.1 =>  (0x00007fff6efcf000)
	libpthread.so.0 => /lib64/libpthread.so.0 (0x0000003218400000)
	libcrypt.so.1 => /lib64/libcrypt.so.1 (0x0000003221c00000)
	libm.so.6 => /lib64/libm.so.6 (0x0000003217c00000)
	libpcre.so.0 => /lib64/libpcre.so.0 (0x000000314ca00000)
	libssl.so.10 => /usr/lib64/libssl.so.10 (0x0000003ef7600000)
	libcrypto.so.10 => /usr/lib64/libcrypto.so.10 (0x0000003ef7200000)
	libdl.so.2 => /lib64/libdl.so.2 (0x0000003218000000)
	libz.so.1 => /lib64/libz.so.1 (0x00000032ed000000)
	libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x000000328f200000)
	libc.so.6 => /lib64/libc.so.6 (0x0000003217800000)
	/lib64/ld-linux-x86-64.so.2 (0x0000003217000000)
	libfreebl3.so => /lib64/libfreebl3.so (0x0000003221800000)
	libgssapi_krb5.so.2 => /lib64/libgssapi_krb5.so.2 (0x0000003223c00000)
	libkrb5.so.3 => /lib64/libkrb5.so.3 (0x0000003224c00000)
	libcom_err.so.2 => /lib64/libcom_err.so.2 (0x0000003222000000)
	libk5crypto.so.3 => /lib64/libk5crypto.so.3 (0x0000003222800000)
	libkrb5support.so.0 => /lib64/libkrb5support.so.0 (0x0000003224800000)
	libkeyutils.so.1 => /lib64/libkeyutils.so.1 (0x0000003222c00000)
	libresolv.so.2 => /lib64/libresolv.so.2 (0x0000003219400000)
	libselinux.so.1 => /lib64/libselinux.so.1 (0x0000003219000000)

GoMartini没有额外依赖包，和python打包很像：

[winlin@dev6 web]$ ldd objs/go.martini 
	linux-vdso.so.1 =>  (0x00007fffd25ff000)
	libpthread.so.0 => /lib64/libpthread.so.0 (0x0000003218400000)
	libc.so.6 => /lib64/libc.so.6 (0x0000003217800000)
	/lib64/ld-linux-x86-64.so.2 (0x0000003217000000)

比较包的大小：

[winlin@dev6 web]$ ls -lh objs/go.martini 
-rwxrwxr-x 1 winlin winlin 6.4M Nov  3 14:35 objs/go.martini
[winlin@dev6 web]$ ls -lh objs/_release/nginx/sbin/nginx
-rwxrwxr-x 1 winlin winlin 14M Nov  3 12:05 objs/_release/nginx/sbin/nginx

GO在这方面做得都不错。

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