Sanic vs Flask vs FastAPI：Python 三大 Web 框架谁才是王者？

原创已于 2025-05-30 10:58:07 修改 · 333 阅读

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文章标签：

#python #flask #fastapi

于 2025-05-30 10:52:08 首次发布

测试实例就用一个简单的json返回进行压测：

Sanic测试程序如下：


from sanic import Sanic
from sanic.response import text
import json

app = Sanic(__name__)


@app.route("/")
async def test(request):
    messages = [
        {
            "role": "system",
            "content": "请你扮演一个有20年中小学K12在线教育的老师，给孩子推荐课程。"
        },
        {
            "role": "user",
            "content": "请问我需要购买哪些课程。"
        }
    ]

    res = json.dumps(messages)
    return text(res)


if __name__ == "__main__":
    app.run(host="0.0.0.0", port=8000)

Sanic测试数据如下：

└─[0] <git:(main f3108d7) > wrk -t8 -c400 -d10s http://localhost:8000/
Running 10s test @ http://localhost:8000/
  8 threads and 400 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     5.81ms    5.46ms 171.21ms   99.30%
    Req/Sec     9.06k   491.75    11.04k    90.62%
  721792 requests in 10.01s, 283.60MB read
  Socket errors: connect 0, read 849, write 17, timeout 0
Requests/sec:  72105.18
Transfer/sec:     28.33MB

Flask的测试代码如下：

import json
from flask import Flask

app = Flask(__name__)

@app.route('/')
def index():
    messages = [
        {
            "role": "system",
            "content": "请你扮演一个有20年中小学K12在线教育的老师，给孩子推荐课程。"
        },
        {
            "role": "user",
            "content": "请问我需要购买哪些课程。"
        }
    ]

    res = json.dumps(messages)
    return {"name": res}

if __name__ == '__main__':
    app.run(debug=True, host='0.0.0.0', port=5000)

Flask的测试结果如下：

└─[0] <git:(main f3108d7) > wrk -t8 -c400 -d10s http://localhost:5000/
Running 10s test @ http://localhost:5000/
  8 threads and 400 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    29.00ms   32.58ms 286.00ms   96.62%
    Req/Sec   529.40    243.40     1.09k    71.05%
  16468 requests in 10.07s, 8.56MB read
  Socket errors: connect 161, read 24535, write 127, timeout 0
Requests/sec:   1635.05
Transfer/sec:    870.22KB

FastAPI的测试程序如下：

import json
from typing import Union
from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def read_root():
    messages = [
        {
            "role": "system",
            "content": "请你扮演一个有20年中小学K12在线教育的老师，给孩子推荐课程。"
        },
        {
            "role": "user",
            "content": "请问我需要购买哪些课程。"
        }
    ]

    res = json.dumps(messages)
    return {"name": res}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}

请用如下命令启动：

fastapi dev fastapitest.py

fastAPI的测试数据如下：

└─[0] <git:(main f3108d7) > wrk -t8 -c400 -d10s http://localhost:8000/
Running 10s test @ http://localhost:8000/
  8 threads and 400 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    81.88ms   30.23ms 392.96ms   89.23%
    Req/Sec   610.37     94.68     1.11k    83.62%
  48742 requests in 10.05s, 23.20MB read
  Socket errors: connect 0, read 1314, write 8, timeout 0
Requests/sec:   4849.82
Transfer/sec:      2.31MB