What is more efficient: single node or multi node loading with Firebase/AngularJS 1.x

Question

I have one page where I need to load multiple nodes from the Firebase Real-Time Database. The structure is as follows:

/overview/$date/list
/overview/$date/alerts
/overview/$date/other

What is more efficient when using AngularJS 1.x:

• load overview/$date once
• or creating multiple functions and loading per node:
  • load /overview/$date/list
  • load /overview/$date/alerts
  • load /overview/$date/other

Answer 1

Assuming that $date only contains those same three children, and you want all the children all the time, you will probably not measure much of a difference between the two. The single query may be a tad faster. But if you have other children under it that you don't want to read, the single query might be slower, as it's loading more data than you need.