Changelog:
==========
* optimize initialization from strings by not constantly resizing buffer
* optimize 'util.hex2ba()' and 'util.base2ba()' by avoiding unnecessary
copies
* optimize 'util.base2ba()' and 'util.ba2base()' for 'n=16' (hexadecimal)
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
