How to Improve Performance of NodeJs API which is returning 2000 records. I am using mssql, promise.all(), array.map() [closed]

1. I am fetching 2000 records from my main table.
2. After getting records I am using approx 15 queries to fetch different statistics using above fetched ids with promise.all().
3. I have optimized all my queries
4. Now I am mapping all that data together according to my response keys structure.

How Can I improve performance of My API ??

additionally is there any better approach to do the same thing.Looking forward to all your answers.