"Following the recent announcement that UBIFS is nearly
production ready, it was asked how UBIFS compares to LogFS. LogFS
author Jörn Engel suggested, 'both share similar design goals.
Biggest difference is that ubifs works on top of ubi and depends on
ubi support, while logfs works on plain mtd (or block devices) and
does everything itself. Code size difference is huge. Ubi weighs
some 11kloc, ubifs some 30, logfs some 8.' He continued:
"'Ubi scales linearly, as it does a large scan at init time. It
is still reasonably fast, as it reads just a few bytes worth of
header per block...'"