[Trac #1446] Merge SD speedup patch

[Zarro Boogs per Child]

#1446: Merge SD speedup patch
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  Reporter:  cjb          |       Owner:  dilinger   
      Type:  enhancement  |      Status:  new        
  Priority:  normal       |   Milestone:  BTest-4    
 Component:  kernel       |     Version:             
Resolution:               |    Keywords:  performance
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Changes (by jg):

  * milestone:  Untriaged => BTest-4

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Ticket URL: <http://dev.laptop.org/ticket/1446#comment:1>
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