Time of the scan

hi, I have GCE 6.0.7 on virtual box (Memory: 4096 MB, Harddisk: 18 GB, CPUs: 2). Yesterday at 8:00 I started the Full and Fast scan (without excluding printers) but this scan isn’t finished yet (it is scanning 29 hours). In network are only 123 hosts. Is there any way to speed up the scan?

Fine tune the dead host detection, alive criteria, etc … you will find many hints here.