[wp-trac] [WordPress Trac] #58290: Save a few processing cycles in `WP_Hook`

[WordPress Trac]

#58290: Save a few processing cycles in `WP_Hook`
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 Reporter:  bor0         |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  normal       |  Milestone:  Awaiting Review
Component:  General      |    Version:  trunk
 Severity:  normal       |   Keywords:  has-patch
  Focuses:               |
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 I found two low-hanging fruits that could improve the performance of
 hooks:

 1. Use `count` only when really needed (sometimes it may not be needed)
 2. `is_object` is redundant in `is_object( $x ) && $x instance of X`

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Ticket URL: <https://core.trac.wordpress.org/ticket/58290>
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