The same with me. My partitions:
Ram usage after start (not scan or defrag):
Ram usage after scan all partitions:
I made a little test:
I have Paragon Drive Backup is an exact copy (sector to sector, the same) in my partition "Z" made (65914 files, 32.6 GiB of 150GiB, 20% fragmented) and this once again with one competitors and their exact copy with Defraggler, defrag on the same partition.
The result:
The competition took 34 minutes and Defraggler took over 4 hours!
I repeat that again. The same result ... But why Defraggler takes so long?
EDIT: All on Windows Vista 64-Bit