[wp-trac] [WordPress Trac] #38903: Prevent `update_option()` from updating when the old and new values contain identical objects.

[WordPress Trac]

#38903: Prevent `update_option()` from updating when the old and new values contain
identical objects.
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 Reporter:  peterwilsoncc                   |       Owner:  peterwilsoncc
     Type:  defect (bug)                    |      Status:  assigned
 Priority:  normal                          |   Milestone:  4.8
Component:  General                         |     Version:  2.0
 Severity:  normal                          |  Resolution:
 Keywords:  early has-patch has-unit-tests  |     Focuses:
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Comment (by peterwilsoncc):

 In [attachment:38903.4.diff]:

 * avoid the `maybe_serialize` calls if they are not needed. This is to
 avoid the performance cost of serialization in most instances.
 * minor formatting changes in the unit tests for coding standards

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Ticket URL: <https://core.trac.wordpress.org/ticket/38903#comment:10>
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