Sanic ， Fastapi都是优秀的python web异步框架，找了半天没找到靠谱的性能对比测试，只能自己做一个。
测试内容：纯get请求、异步ORM读
测试工具：WRK
测试代码：由于两者代码非常相似，本文就直接放上fastapi的代码demo了。
1、纯get请求 压测：
1.1 ：代码
1.2 : 结果
1.2.1 Sanic
Running 30s test @ http://0.0.0.0:7006/
4 threads and 1000 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 6.26ms 5.01ms 82.78ms 85.31%
Req/Sec 9.85k 7.36k 23.68k 50.08%
Latency Distribution
50% 4.27ms
75% 7.64ms
90% 13.17ms
99% 24.40ms
1176945 requests in 30.08s, 126.83MB read
Socket errors: connect 751, read 25, write 0, timeout 0
Requests/sec: 39131.24
Transfer/sec: 4.22MB
1.2.2 Fastapi
Running 30s test @ http://0.0.0.0:7000/index
4 threads and 1000 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 52.14ms 25.04ms 209.52ms 67.22%
Req/Sec 4.07k 0.88k 6.78k 71.38%
Latency Distribution
50% 49.73ms
75% 69.48ms
90% 84.76ms
99% 118.72ms
486736 requests in 30.04s, 65.91MB read
Socket errors: connect 0, read 1006, write 2, timeout 0
Requests/sec: 16202.60
Transfer/sec: 2.19MB
2、异步ORM读 压测：
2.1.1 Sanic
Running 30s test @ http://0.0.0.0:7005/testdb
4 threads and 1000 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 66.76ms 57.26ms 558.07ms 77.71%
Req/Sec 0.94k 384.55 1.84k 53.17%
Latency Distribution
50% 44.23ms
75% 108.09ms
90% 143.02ms
99% 247.15ms
111825 requests in 30.07s, 14.40MB read
Socket errors: connect 751, read 108, write 0, timeout 0
Requests/sec: 3719.34
Transfer/sec: 490.34KB
2.1.2 Fastapi
Running 30s test @ http://0.0.0.0:7000/testdb
4 threads and 1000 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 454.12ms 483.01ms 5.60s 86.84%
Req/Sec 699.22 153.92 1.38k 75.95%
Latency Distribution
50% 376.73ms
75% 636.51ms
90% 1.06s
99% 2.17s
82939 requests in 30.10s, 10.69MB read
Socket errors: connect 0, read 659, write 0, timeout 0
Non-2xx or 3xx responses: 379
Requests/sec: 2755.36
Transfer/sec: 363.74KB
3 结论
3.1 纯性能sanic大约是fastapi的2.5倍，sanic单机并发接近 4万 Requests/sec，而fastapi只有1.6万。
3.2 使用异步ORM进行数据库读时，瓶颈更多在数据库方面，但同样条件下，fastapi性能仍然比sanic略低，大约为sanic并发性能的0.7倍。
4 感言
python3.6版本以后web的性能真的是可比Golang了（实测sanic比go的gin框架性能约低一半，但仍处于一个数量级），限制服务器性能的更多时数据库和带宽，正常一个带数据库读写的api接口并发能到3000已经很牛了，无论哪个框架性能都过剩了。
