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操作系统 ： centos7.3.1611_x64
python 版本 : 3.6.8
tornado版本：6.0.2
snaic版本：19.9.0
cpu ： intel(r) core(tm) i5-2320 cpu @ 3.00ghz 4核
之前一直使用tornado作为http相关python程序的框架，最近查资料发现新出的snaic性能很高，这里在同样硬件条件下使用ab进行简单的压测。
安装apache ab工具：
yum -y install httpd-tools
压测命令：
ab -c 30 -n 100000 http://127.0.0.1:9093/
参数说明：
-c ：模拟并发数
-n : 总请求数
使用tornado实现的简单http服务器代码：
https://github.com/mike-zhang/pyexamples/blob/master/httprelate/httpserver/tornadotest1.py
使用snaic实现的简单http服务器代码：
https://github.com/mike-zhang/pyexamples/blob/master/httprelate/httpserver/snaictest1.py
tornado测试结果：
我要评论server software: tornadoserver/6.0.2
server hostname: 127.0.0.1
server port: 9093
document path: /
document length: 12 bytes
concurrency level: 30
time taken for tests: 82.282 seconds
complete requests: 100000
failed requests: 0
write errors: 0
total transferred: 20700000 bytes
html transferred: 1200000 bytes
requests per second: 1215.33 [#/sec] (mean)
time per request: 24.685 [ms] (mean)
time per request: 0.823 [ms] (mean, across all concurrent requests)
transfer rate: 245.68 [kbytes/sec] received
connection times (ms)
min mean[+/-sd] median max
connect: 0 0 0.2 0 8
processing: 1 25 10.3 25 74
waiting: 1 24 10.3 25 74
total: 1 25 10.3 25 74
percentage of the requests served within a certain time (ms)
50% 25
66% 30
75% 33
80% 34
90% 37
95% 39
98% 41
99% 42
100% 74 (longest request)
snaic测试结果：
server software:
server hostname: 127.0.0.1
server port: 9093
document path: /
document length: 12 bytes
concurrency level: 30
time taken for tests: 20.164 seconds
complete requests: 100000
failed requests: 0
write errors: 0
total transferred: 11100000 bytes
html transferred: 1200000 bytes
requests per second: 4959.29 [#/sec] (mean)
time per request: 6.049 [ms] (mean)
time per request: 0.202 [ms] (mean, across all concurrent requests)
transfer rate: 537.58 [kbytes/sec] received
connection times (ms)
min mean[+/-sd] median max
connect: 0 2 0.5 2 11
processing: 1 4 1.5 4 38
waiting: 0 4 1.4 3 37
total: 1 6 1.5 6 41
percentage of the requests served within a certain time (ms)
50% 6
66% 6
75% 7
80% 7
90% 7
95% 8
98% 9
99% 10
100% 41 (longest request)
从测试结果可以看到，开启两个进程情况下：
tornado的cps是 1215.33 ，平均响应时间是 24.685 ms
snaic的cps是 4959.29 ，平均响应时间是 6.049 ms
修改并发数后的测试数据如下：
测试结果对比如下：
从测试数据来看，snaic的cps比tornado高，平均响应时间方面，snaic也比tornado短。
本文github地址：
https://github.com/mike-zhang/mikeblogessays/blob/master/2019/20191102_snaic和tornado的简单性能测试.rst
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