[Boost-users] [Property Tree] Complexity of find and get methods

Hi I want to know the complexity of boost property tree find and get methods. I tried the following link http://www.boost.org/doc/libs/1_41_0/doc/html/boost/property_tree/basic_ptre... but it seems that the complexity is not specified. Also can find function accept string paths or it just finds immediate childs? Thank you