[wp-trac] [WordPress Trac] #58472: Emoji loader script causes ~100ms long task

[WordPress Trac]

#58472: Emoji loader script causes ~100ms long task
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 Reporter:  westonruter             |       Owner:  westonruter
     Type:  defect (bug)            |      Status:  closed
 Priority:  high                    |   Milestone:  6.3
Component:  Emoji                   |     Version:  4.2
 Severity:  normal                  |  Resolution:  fixed
 Keywords:  needs-testing has-      |     Focuses:  javascript, performance
  patch                             |
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Comment (by westonruter):

 Follow up: #58978.

 I discovered that ''any'' reference to `sessionStorage` in sandboxed
 iframe lacking the `allow-same-origin` flag will cause an error to be
 emitted to the console (at least in Chrome DevTools), and only for the
 first reference. It doesn't seem to impact the execution in any way,
 however.

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Ticket URL: <https://core.trac.wordpress.org/ticket/58472#comment:39>
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