How to speed up sending Node js requests?

Question

Node.js

The bottom line is that I process the received JSON through a websocket connection, take information from it and send a post request. I am sending several request parameters and I would like to know if removing one of them will greatly affect the speed of sending and receiving a request by the server? Also, I want to know what exactly affects the speed of processing JSON data + sending them, maybe it's worth changing JS to any other language?
I also compared the results with VDS (with a higher speed than mine several times) and in the end it turns out that VDS sees data from websocket for ~ 3-5 seconds earlier than my computer + Internet