Multiple simultaneous requests

Hello, An Tao!

I'm making a lot of API requests at the same time. I get the data divided into parts. I see 2 approaches:

1. drogon::HttpClient::newHttpClient(this->base_url) create for each request, but then error:
20250815 06:45:29.047886 UTC 5681 FATAL Too many open files (errno=24) sockets::createNonblockingOrDie - Socket.h:43.

2. If I do one the client runs smoothly, but for a very long time: sending is fast, and receiving responses is consistent and long.

Can you help me make sure that a large amount of data can be uploaded quickly?
Thank you very much in advance!