[wp-trac] [WordPress Trac] #39210: switch_to_locale() unloads all plugin and theme translations

[WordPress Trac]

#39210: switch_to_locale() unloads all plugin and theme translations
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 Reporter:  gchtr                                |       Owner:  ocean90
     Type:  defect (bug)                         |      Status:  reopened
 Priority:  normal                               |   Milestone:  6.1
Component:  I18N                                 |     Version:  4.7
 Severity:  normal                               |  Resolution:
 Keywords:  has-unit-tests has-patch needs-dev-  |     Focuses:
  note                                           |
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Comment (by swissspidy):

 We have now already established that there's a bug here causing too many
 calls to `load_textdomain()`. Simple as that. No need for detailed
 performance analysis for other sites or anything.

 We have also already established that ideally we fix this or revert this
 if we can't fix it in the required time frame.

 Good news is that I have a [https://github.com/WordPress/wordpress-
 develop/pull/3506 draft PR] fixing this PR. It's like 99% complete.

 Feel free to to check it out. I will continue looking into it myself when
 my next workday commences.

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Ticket URL: <https://core.trac.wordpress.org/ticket/39210#comment:71>
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