[mlpack-svn] [MLPACK] #243: Dual cover tree traverser is quite slow

MLPACK Trac trac at coffeetalk-1.cc.gatech.edu
Thu Nov 29 19:14:00 EST 2012

#243: Dual cover tree traverser is quite slow
  Reporter:  rcurtin                                        |        Owner:  rcurtin     
      Type:  defect                                         |       Status:  accepted    
  Priority:  major                                          |    Milestone:  mlpack 1.0.4
 Component:  mlpack                                         |   Resolution:              
  Keywords:  cover tree, dualtreetraverser, neighborsearch  |     Blocking:              
Blocked By:                                                 |  

Comment (by rcurtin):

 With some changes to how the bound is propagated in r13955 through r13959,
 the following numbers are produced:

  * jl-constructed cover tree, jl dual-tree traversal: 83962 (as before)
  * jl-constructed cover tree, mlpack dual-tree traversal: 98201 (used to
 be 247537)
  * mlpack-constructed cover tree, mlpack dual-tree traversal: 112039 (used
 to be 189628)

 We have some improvement, but I believe jl's implementation makes a few
 more opportunistic prunes than our implementation currently does.  So this
 isn't quite done yet.

Ticket URL: <http://trac.research.cc.gatech.edu/fastlab/ticket/243#comment:4>
MLPACK <www.fast-lab.org>
MLPACK is an intuitive, fast, and scalable C++ machine learning library developed by the FASTLAB at Georgia Tech under Dr. Alex Gray.

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