After enabling this mod in an existing save (space exploratrion, ~300mb save file) the game became extremely slow and sluggish, probably due to it generating labels for existing chunks.

However, after letting it run for a while after all surfaces had labels and looking at autosave file size, the save file size keeps increasing (I disabled the mod again at 400MB), also, memory usage of factorio keeps increasing. Using F5 shows that the chunk generator is constantly busy, as is this mod.

I didn't expect that this mod would generate new chunks - from the description, I would have assumed it would only scan existing chunks.