Hibernate: findById vs findAllById, what to use for list of ids and non-nested for loops

Question

1. I have a list of ids that are associated with objects to fetch. I need to process each object after fetching them.

   Should I get the list of objects using findAllById, so there will be one DB call and then process the result using for loop?

   OR

   Should I run the for loop for ids, and process each object using findById? Which seems bad as it will do multiple DB calls.

2. Is multiple non-nested for loop better than multiple DB calls?

Answer 1

1. Its better using findAllByIds because one DB call and if you want to process each data, you can achieve that by doing loop/foreach/stream

2. Yes, because it would decrease the minimum of error by creating DB call.