Drupal's standard Field storage module loads makes 1 SQL query per field during entity load, which can be suboptimal with many fields. This module allows loading multiple fields per query, hence reducing the number of SQL queries during entity load.
This module only works when loading the current revision of an entity, trying to load an older revision will still use the Drupal standard way.
Field Formatter Range is very simple module that provides the option to display only selected range of values for multivalued entity fields.
For example if you have an image field attached to an entity and the entity has 15 images attached to it but you want to display only the first 5 of them, this module is exactly what you are looking for.
Beside setting the range(offset and number of items to show) you can also reverse the order so you can display just the last 5 images and by setting proper values you can display them in order or in reverse order too.