httpx is easier to use than aiohttp

test.py

import time
import uuid
import asyncio

import httpx
import aiohttp

url = "http://localhost:8080/"


async def query(client, user_id, text):
    r = await client.post(url + user_id, json={"text": text})
    data = r.json()
    if asyncio.iscoroutine(data):
        return await data
    else:
        return data


async def main(method, num=100):
    users = [str(uuid.uuid4()) for _ in range(num)]
    if method == "httpx":
        client = httpx.AsyncClient(timeout=None)
    elif method == "aiohttp":
        connector = aiohttp.TCPConnector(limit=None)
        client = aiohttp.ClientSession(connector=connector)
    async with client:
        data = await asyncio.gather(*[query(client, u, "test") for u in users])
        # print(data)


async def mmain(method):
    await asyncio.gather(*[main(method, num=100) for _ in range(10)])


now = time.time()
# asyncio.run(main("httpx"))
asyncio.run(mmain("httpx"))
now, old = time.time(), now
print(now - old)
# asyncio.run(main("aiohttp"))
asyncio.run(mmain("aiohttp"))
now, old = time.time(), now
print(now - old)
# aiohttp.client_exceptions.ClientOSError: [Errno 104] Connection reset by peer
# python3 test.py

test_web.py

from flask import Flask, request, jsonify

app = Flask(__name__)


@app.route("/<user_id>", methods=["POST"])
async def callback(user_id):
    return jsonify({"name": user_id, "data": request.json})


# gunicorn --workers=1 -b 0.0.0.0:8080 --worker-connections 8192 test_web:app