[Yt-dev] new branch with lower overhead

[Matthew Turk]

Hi guys,

I've been working on a new branch:

http://svn.enzotools.org/yt/grid-optimization/

to pull down overhead on large hierarchies, specifically for Kraken.
If you could give it a checkout and run some simple analysis with it,
that'd be awesome -- right now it passes all the unit tests, so any
failures *you* run into should be made into *new* unit tests.  It's
substantially faster and substantially lower memory (40% less for the
L7 run) so I'd like to make sure it works, merge it back and kill.  It
also features a fairly important fix to the Covering Grids.

-Matt