f2fs has been design from the ground up for SSD device. It has been designed to improve SSD lifespan.
The f2fs maintainer is now at Google, Jaegeuk Kim (jaegeuk@)

f2fs vs ext4 performance on 4.12 are similar: http://openbenchmarking.org/result/1705203-TR-LINUX412F50&obr_imw=y


To install new machine with f2fs stateful partition, we need to make several changes: 
- chromeos-installer: initial installation
- chromeos-init: mount, clobber
- cryptohome: normally no change are required, as ioctls for directory encryption are identical, verify there is no assumption ext4 is the underlying filesystem
- ARC++ 
- everywhere tunefs is used.