btrfs subvol snapshot -r /home /home/backup/$(date +%Y-%m-%d:%H:%M)

The above command takes more than 10 seconds on a system with an Intel 120G 
SSD but less than 1 second on a system with a hard disk identified as "HITACHI 
HTS72201 DC2Z".

Also I've noticed that every system which uses BTRFS on an Intel 120G SSD 
gives very poor performance when installing Debian packages (which calls 
sync()).  I'm using the ssd and discard mount options.

Does the Intel SSD just suck for the type of writes that BTRFS does when 
synchronising things or is there some way of tweaking it for performance?

-- 
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