[wp-trac] [WordPress Trac] #63026: Investigate potential performance regressions when using PHP 8.4

[WordPress Trac]

#63026: Investigate potential performance regressions when using PHP 8.4
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 Reporter:  desrosj       |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Database      |    Version:
 Severity:  normal        |   Keywords:  needs-testing
  Focuses:  performance   |
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 It seems that when using PHP 8.4, there is a considerable decrease in
 overall performance in combination with MySQL databases.

 This was spotted because there have been more frequent occurrences of the
 PHPUnit test suite failing due to the configured 20 minute timeout being
 exceeded. For an example, see the annotations at the
 [https://github.com/WordPress/wordpress-
 develop/actions/runs/13472751303/attempts/4 bottom of this run summary].
 The related jobs take 2-3x longer to complete.

 The Performance Testing workflow runs using the `latest` tag for PHP,
 which currently is applied to the 8.2 container where this decrease is not
 apparent.

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Ticket URL: <https://core.trac.wordpress.org/ticket/63026>
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