final compare (2 GB, 10,000 files in directory):
- remove-item: 2.4 files/sec average (n=10)
- /purge : 2.4 files/sec average (n=3)
- /purge /mt: 2.5 files/sec average (n=3)
- explorer-based click-delete: 3.1 files/sec (n=30)
- /mir: 5.5 files/sec (n = 100)