为什么 aiohttp 的工作速度比 run_in_executor 包装的请求慢？

Question

全部！

我需要向 Web 服务发出大约 10,000 个请求，我期望 JSON 响应。由于请求是相互独立的，我想并行运行它们。我认为aiohttp可以帮助我。我写了以下代码：

import asyncio
import aiohttp


async def execute_module(session: aiohttp.ClientSession, module_id: str,
                         post_body: dict) -> dict:
    headers = {
        'Content-Type': r'application/json',
        'Authorization': fr'Bearer {TOKEN}',
    }

    async with session.post(
            fr'{URL}/{module_id}/steps/execute',
            headers=headers,
            json=post_body,
    ) as response:
        return await response.json()


async def execute_all(campaign_ids, post_body):
    async with aiohttp.ClientSession() as session:
        return await asyncio.gather(*[
            execute_module(session, campaign_id, post_body)
            for campaign_id in campaign_ids
        ])

campaign_ids = ['101', '102', '103'] * 400
post_body = {'inputs': [{"name": "one", "value": 1}]}

print(asyncio.run(execute_all(campaign_ids, post_body)))

PS我提出了 1,200 个测试请求。

解决它的另一种方法 - 包裹requests.post在run_in_executor函数中。我知道在异步函数中使用阻塞代码是错误的，但它工作得更快（~ 7 秒对 aiohttp ~ 10 秒）

import requests
import asyncio


def execute_module(module_id, post_body):
    headers = {
        'Content-Type': r'application/json',
        'Authorization': fr'Bearer {TOKEN}',
    }

    return requests.post(
        fr'{URL}/{module_id}/steps/execute',
        headers=headers,
        json=post_body,
    ).json()

async def execute_all(campaign_ids, post_body):
    loop = asyncio.get_running_loop()
    return await asyncio.gather(*[
        loop.run_in_executor(None, execute_module, campaign_id, post_body)
        for campaign_id in campaign_ids
    ])

campaign_ids = ['101', '102', '103'] * 400
post_body = {'inputs': [{"name": "one", "value": 1}]}

print(asyncio.run(execute_all(campaign_ids, post_body)))

我究竟做错了什么？

Answer 1

您尝试过 uvloop - https://github.com/MagicStack/uvloop吗？这应该会提高 aiohttp 请求的速度