Thanks for your comment. You are right, asyncio and aiohttp is a great combination. I've used them both before. Though aiohttp cost less memory than requests,

Thanks for your comment. You are right, asyncio and aiohttp is a great combination. I've used them both before. Though aiohttp cost less memory than requests, aiohttp does't support https proxy. This is the only one that isn't so perfect. Besides , asyncio is something the same as concurrency of celery. I will have a test which one will have a better performance. Thanks for your comment again.