This mod uses a selection planner to delete chunks. Any chunk that overlaps the selection planner area will be deleted (unique to this mod: other mods may delete chunks based on how close the selection planner is to the upper left corner of the surrounding chunks or how large the selection is).
By default, chunks containing entities on the player force will be preserved, but pressing the alternate select key (shift by default) will ignore entities while preserving chunks that contain players.
This mod is more performant than the mod it was inspired by because it only searches for entities when those searches will be used.