[ET Trac] [Einstein Toolkit] #1771: Improve performance of CarpetInterp2 interpolation

[Einstein Toolkit]

#1771: Improve performance of CarpetInterp2 interpolation
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 Reporter:  hinder       |       Owner:  eschnett           
     Type:  enhancement  |      Status:  new                
 Priority:  minor        |   Milestone:                     
Component:  Carpet       |     Version:  development version
 Keywords:               |  
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 The branch
 https://bitbucket.org/eschnett/carpet/branch/ianhinder/fasterp_opt#diff
 contains an optimisation to the CarpetInterp2 interpolation routine which
 improved the performance of Llama interpatch interpolation in my test by a
 factor of 5.  I did this a while ago, and haven't looked at it recently.
 Before merging, the following should be done:
 1. Check that is applies cleanly to the current version of Carpet
 2. Decide whether the vectorisation pragmas need to be protected by Cactus
 preprocessor guards
 Or any other changes which people think might be necessary.
 This should wait until after the upcoming (May 2015) release of the ET.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1771>
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