Optimal performing query for latest record for each N

Question

Here is the scenario I find myself in.

I have a reasonably big table that I need to query the latest records from. Here is the create for the essential columns for t

Answer 1

If your records are inserted sequentially, replacing TimeStamp in your query with ID may make a difference.

As a side note, how many records is this returning? Your delay could be network overhead if you are getting hundreds of thousands of rows back.