Thanks for sharing your question. To best help you with this we’ll need a bit more information..

• Can you clarify “slow” in this context? Are you seeing slow data transfer speeds between your client and server, slow time to first response or high ping times?

• What type of communication is used between client and server UDP/TCP? http?

• Is your node.js app having to do database queries? If so, what steps have you taken to optimize your database configuration?

• Is your node.js app running standalone or through a proxy like nginx?

Thanks for quick response ,

1st i want to highlight that when i use my nodeJs server in my local computer the game runs without any lag ,
thats why i think the problem is from digitalocien host

now answering your queries ,

1-the message between server and clients are slow
2-TCP / but agian the server and game work very good when i use my local host
3-no database just node file .js and no database directly from the clients to the server
4-i didnt use any proxy

i was thinking if there is a special service for realtime game host if you any thing about that please let me know