[wp-trac] [WordPress Trac] #33376: Create index on user_email

[WordPress Trac]

#33376: Create index on user_email
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 Reporter:  chriscct7                |       Owner:  chriscct7
     Type:  enhancement              |      Status:  assigned
 Priority:  normal                   |   Milestone:  Future Release
Component:  Database                 |     Version:
 Severity:  normal                   |  Resolution:
 Keywords:  has-patch needs-refresh  |     Focuses:  performance
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Comment (by ocean90):

 Replying to [comment:4 DrewAPicture]:
  > The [https://wordpress.org/plugins/allow-multiple-accounts/ Allow
 Multiple Accounts] plugin by @coffee2code has been a popular choice for
 years for allowing multiple accounts with the same email. So it's not
 really unheard of.

 That's an interesting plugin. I'm curious if any of the sites are using a
 persistent object cache because there is a `useremail` cache group which
 gets used by `WP_User::get_data_by()`.

 cc: @pento

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Ticket URL: <https://core.trac.wordpress.org/ticket/33376#comment:12>
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