[wp-trac] [WordPress Trac] #31556: `$wpdb` global object should be retrieved via a helper function to help prevent global stomping

[WordPress Trac]

#31556: `$wpdb` global object should be retrieved via a helper function to help
prevent global stomping
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 Reporter:  jtsternberg            |       Owner:
     Type:  enhancement            |      Status:  new
 Priority:  normal                 |   Milestone:  Awaiting Review
Component:  Query                  |     Version:  4.2
 Severity:  normal                 |  Resolution:
 Keywords:  has-patch 2nd-opinion  |     Focuses:
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Comment (by jdgrimes):

 Replying to [comment:6 jdgrimes]:
 > I realize performance may not be a big concern here, but FWIW, a
 function call takes over twice the amount of time as declaring a global.
 We might want to consider just replacing `global $wpdb` with `$wpdb =
 wpdb()`. Less churn, no global, more performant.

 To clarify, what I'm saying is that replacing every single use of the
 `$wpdb` variable with a call to a function will reduce performance.
 Calling the function just once, and using the variable as we already do
 will be more performant and won't require the code churn.

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Ticket URL: <https://core.trac.wordpress.org/ticket/31556#comment:7>
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