Express/NodeJS + Mongoose App server response slow

Hey you can try hosting your server and database in the same region. I think the network is creating a overhead in this case. If the server and the database are in the same region, They are on the same network which will reduce the latency significantly. there is a diagram on aws for this

I add some problem like yours with an app that i developed in my master degree. I add to put a node.js api running online to present it in class room.And i realized that every time i wanted to make a call in the api the response was taking allot of time. I realized that one of the problems was the school network because of the firewalls. Also the place where i put the server heroku.com was giving some delay as well. What i did was use Redis ( https://redis.io/ ) to improve the performance, also heroku was giving me some problems because of the requests being http and not https.

Make a test running the app and data on your localhost and see the performance. if you don´t have any issue try to check if nothing is messing with your request like the place where you host your node server.

Let me know if this helps or if you still have issues so i can try to help you out better.

I had the same issue once with my nodejs code using the same development stack(mongodb,nodejs), I got into trouble of late response from api, and after spending a lot of time I found my server the real culprit I then changed from heroku to amazon aws EC2 instance and things started working fast and amazingly fast, so probably your web server is culprit

to make sure mongodb is not culprit, write an api endpoint where you can just return some json response without making any query to database.