[ET Trac] [Einstein Toolkit] #1196: Improve performance of Multipole interpolation

[Einstein Toolkit]

#1196: Improve performance of Multipole interpolation
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  Reporter:  hinder       |       Owner:     
      Type:  enhancement  |      Status:  new
  Priority:  major        |   Milestone:     
 Component:  Other        |     Version:     
Resolution:               |    Keywords:     
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Comment (by eschnett):

 I do not think that CarpetInterp2 is faster per se. It may be faster (does
 anybody have numbers?) since it pre-calculates the stencil coefficients
 and the communication schedule. That is, if we offered a Cactus
 interpolator compatible implementation, then (by default) there would not
 be any speedup. The largest complication is to restructure to code to
 allow precalculation; this usually requires scheduling another routine,
 duplicating a loop, using a static variable, etc. This would still be
 required even if the Cactus interpolator interface was used.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1196#comment:1>
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