[wp-trac] [WordPress Trac] #29983: Only POST dirty settings to Customizer preview to improve performance

[WordPress Trac]

#29983: Only POST dirty settings to Customizer preview to improve performance
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 Reporter:  celloexpressions  |      Owner:
     Type:  enhancement       |     Status:  new
 Priority:  normal            |  Milestone:  4.1
Component:  Bundled Theme     |    Version:  3.4
 Severity:  normal            |   Keywords:  has-patch
  Focuses:                    |
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 Moving off of #28580 so that we can retain that for history even if we
 decide not to fix it. Patch from @westonruter.

 This is almost a bug as it probably should've happened like this from the
 beginning, and will cause significant performance improvements when we do
 things like Menus in the Customizer.

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Ticket URL: <https://core.trac.wordpress.org/ticket/29983>
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