[wp-trac] [WordPress Trac] #60095: Performance issue in Object Cloning using JSON.parse(JSON.stringify()) on Safari and Firefox

[WordPress Trac]

#60095: Performance issue in Object Cloning using JSON.parse(JSON.stringify()) on
Safari and Firefox
--------------------------+-------------------------------------------
 Reporter:  omeri6        |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:  6.4
 Severity:  major         |   Keywords:  needs-patch changes-requested
  Focuses:  performance   |
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 WordPress 6.4 started using the latest version of core-js. This latest
 version creates significant performance issues in Safari and Firefox for
 Elementor users, and for any other plugins or products using JSON parse to
 clone objects.

 Our performance team confirmed that the loading time on Chrome is faster.
 We detected that the problem is associated with the following commit of
 core-js (used in wp-polyfill): [https://github.com/zloirock/core-
 js/commit/08ceeb13e78aeb366a3fcf481698ec05f77e7b2f]

 We managed to partially solve the issue by replacing the code with
 structuredClone( object ). However we couldn't replace all the occurrences
 of JSON.parse( JSON.stringify( object ) ) with structuredClone(), as
 structuredClone() doesn't accept methods.

 Using alternative solutions to deep clone objects either increased loading
 time or had no effect.

 After discussing the issue directly with corejs team, they suggested the
 following solution:
 [https://github.com/zloirock/core-js/issues/1316]

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Ticket URL: <https://core.trac.wordpress.org/ticket/60095>
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