[wp-meta] [Making WordPress.org] #2552: Support Forums: Bring "Also Viewing" Native

[Making WordPress.org]

#2552: Support Forums: Bring "Also Viewing" Native
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 Reporter:  Ipstenu         |       Owner:  (none)
     Type:  enhancement     |      Status:  new
 Priority:  normal          |   Milestone:
Component:  Support Forums  |  Resolution:
 Keywords:  needs-patch     |
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Comment (by dd32):

 If we were to bring this in-house, I think adding it as a toggle menu item
 under the Profile menu in the Admin Bar would be a good way to allow those
 who know what it is to opt-in, even if we could handle the load of
 everyone using it.

 Ideally it would be implemented through not-post_meta and rather through
 an in-memory thing like memcache to avoid the DB writes, but unfortunately
 I can't think of an easy way to do that with Memcache due to it's non-
 support for multiple distinct values for a single key.
 I guess it could potentially be implemented as a
 [https://dev.mysql.com/doc/refman/8.0/en/memory-storage-engine.html MySQL
 MEMORY table] which would at least avoid the DB load of querying the
 post_meta table constantly.

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Ticket URL: <https://meta.trac.wordpress.org/ticket/2552#comment:7>
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