Hrmmm, so I did a test and thought "maybe this is kinda slow and not great performance"
```darklight@chrislinux:~$ sudo hdparm -tT /dev/mapper/encrypted 

/dev/mapper/encrypted:
 Timing cached reads:   29152 MB in  1.99 seconds = 14630.15 MB/sec
 Timing buffered disk reads:  84 MB in  3.02 seconds =  27.78 MB/sec
darklight@chrislinux:~$ sudo hdparm -tT /dev/nbd0

/dev/nbd0:
 Timing cached reads:   28564 MB in  1.99 seconds = 14333.76 MB/sec
 Timing buffered disk reads: 122 MB in  3.03 seconds =  40.23 MB/sec```