[wp-trac] [WordPress Trac] #51678: [5.6 Beta] Performance regression with i10n changes when translations files are not present

[WordPress Trac]

#51678: [5.6 Beta] Performance regression with i10n changes when translations files
are not present
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 Reporter:  vedjain                              |       Owner:  (none)
     Type:  defect (bug)                         |      Status:  new
 Priority:  high                                 |   Milestone:  5.6
Component:  I18N                                 |     Version:  trunk
 Severity:  normal                               |  Resolution:
 Keywords:  needs-testing has-patch has-unit-    |     Focuses:
  tests dev-feedback 2nd-opinion                 |
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Comment (by hellofromTonya):

 Replying to [comment:9 swissspidy]:
 > So if there‘s no es_ES mo file I cannot switch to de_DE? Sounds odd.

 I agree. Though it may seem "unlikely" to switch locale in the same
 request, it does seem plausible that there are sites where this occurs.
 For those sites, this would be a breaking change. Hence, seeking 2nd
 opinion on the original proposal.

 Is there a way to retain the ability to switch locales while also
 addressing the performance concern raised by @vedjain?

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Ticket URL: <https://core.trac.wordpress.org/ticket/51678#comment:10>
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