What makes a bot to be slow?

>bad internet connection >Unoptimized code >threadlocking >problems with external systems (apis, databases, etc) >Problems on telegrams side

How it is related with database? I am using Postgresql; Is that could cause the problem?

database calls can take a significant time. But you shouldn't start there

I believe that but then where should I call the database ?

Where is ur location and location of server? What a server are u using? Are u using long polling or web hooks? Are u using a bot-constructor or any framework?

Webhook render.com neon

did u choose location of vps?

random

measure ping from client to server

u can use postman for this

can u share link to neon docs or official website?

Search it

This https://www.npmjs.com/package/neon-framework?activeTab=readme ?

Just search for postgresql hosting

Side note: this is kinda rich, considering the circumstances.

Render is kinda slow. You can use Railway

I have an account of 7 months age github account, but they couldn't verify my github account

I think you need at least an year old account.