Arun Sirpal discusses Query Performance Insight in Azure SQL Databases:
Here you will be presented with the TOP X queries based on CPU, Duration or Execution count. You will have the ability to change the time period of analysis, return 5, 10 or 20 queries using aggregations SUM, MAX or AVG.
So let’s look at what information is provided based on queries with high AVG duration over the last 6 hours.
Looks like an interesting way to get information on the few most heavily used queries.