Optimize handlers for large datasets

**Description**
Currently components lacks proper import support.

**Proposed solution**
Add configurable import with sensible defaults.

**Priority**: Low/Medium

No files or tests are named. Start by locating the handlers and component import path, then determine how configurable imports and their defaults should work for large datasets. Done means components support import with sensible configurable defaults and the relevant behavior is verified.

Written by the indexing model from the issue text.