[wp-trac] [WordPress Trac] #58384: locate_template calls file_exists a lot

[WordPress Trac]

#58384: locate_template calls file_exists a lot
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 Reporter:  spacedmonkey  |      Owner:  (none)
     Type:  enhancement   |     Status:  new
 Priority:  high          |  Milestone:  Future Release
Component:  Themes        |    Version:  4.7
 Severity:  normal        |   Keywords:
  Focuses:  performance   |
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 The function `locate_template` calls `file_exists` three times for every
 each template name. As locate_template can be called multiple times on a
 page request for both classic and block themes, this can result in poor
 performance for this function.

 As `file_exists` can be an expensive function to run, as the file lookup
 on file system can be slow, some level of caching should be added to this
 function.

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Ticket URL: <https://core.trac.wordpress.org/ticket/58384>
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