On Sat, Apr 17, 2010 at 1:05 AM, Per Vognsen <per.vogn...@gmail.com> wrote:
> You can only do slow
> linear-time lookups by traversing the tree's nodes exhaustively.

Correction: You do not have to do a linear search on the whole tree
but only on the subset of the tree for which the comparator returns 0
with your queried value.
That is the whole tree in the worst case and a significant fraction of
the whole tree in many practical cases.

Let's say the tree is constructed based on age and you're searching a
university database for some specific person aged 18. The span of ages
among university students is small, so a logarithmic search of the
age-based tree probably only reduces the total search space by a
fourth. Even with the help of the tree, you're still left to linear
search n/4 elements.

-Per

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