[wp-trac] [WordPress Trac] #32103: Multidimensional Customizer settings (options & theme mods) are not scalable

[WordPress Trac]

#32103: Multidimensional Customizer settings (options & theme mods) are not
scalable
-------------------------------------------------+-------------------------
 Reporter:  Air.                                 |       Owner:
     Type:  defect (bug)                         |  westonruter
 Priority:  normal                               |      Status:  accepted
Component:  Customize                            |   Milestone:  4.4
 Severity:  normal                               |     Version:  3.4
 Keywords:  needs-testing needs-unit-tests has-  |  Resolution:
  patch                                          |     Focuses:
                                                 |  performance
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Changes (by westonruter):

 * keywords:  needs-patch => needs-testing needs-unit-tests has-patch


Comment:

 In [attachment:32103.wip2.diff], the increase in the number of
 multidimensional settings shows performance changes from an quadratic
 O(n^2^) to instead be a linear O(n), though actually the slope is so
 shallow that it is much closer to a constant O(1).  In other words,
 instead of an exponential increase in time to render the preview when the
 number of multidimensional settings increase, this patch yields preview
 refresh times that are consistent whether there are 50 dirty settings or
 500 dirty settings (200ms vs 300ms, in contrast to trunk at 650ms vs 49s,
 respectively).

 Patch is still WIP and needs new unit tests, as well as fixing a couple
 broken unit tests.

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Ticket URL: <https://core.trac.wordpress.org/ticket/32103#comment:31>
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