#2711 BLOC First D: implement real sorting in the datastore

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#2711: implement real sorting in the datastore
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  Reporter:  tomeu        |       Owner:  bcsaller              
      Type:  enhancement  |      Status:  assigned              
  Priority:  blocker      |   Milestone:  First Deployment, V1.0
 Component:  datastore    |     Version:                        
Resolution:               |    Keywords:                        
  Verified:  0            |  
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Changes (by marco):

  * priority:  normal => blocker
  * milestone:  Untriaged => First Deployment, V1.0


Comment:

 Man, comment 7 is totally incorrect.

 Doing sorting outside xapian is simply insane. We are retrieving the whole
 database to do then limiting and sorting in memory. That's just wrong. It
 impacts performance and memory at the point of making sugar unusable after
 a few days of use.

 We need to reconsider the multiple merged stores design and figure out a
 sane solution. If we can't we should just drop it for 1.0. It's not like
 it's used anywhere yet, anyway.

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Ticket URL: <https://dev.laptop.org/ticket/2711#comment:8>
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