[wp-trac] [WordPress Trac] #56440: Embed blocks in widget areas caching in many posts

[WordPress Trac]

#56440: Embed blocks in widget areas caching in many posts
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 Reporter:  eceleste      |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Embeds        |    Version:  6.0.1
 Severity:  normal        |   Keywords:
  Focuses:                |
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 When I am using blocks for my widget areas I can include an oEmbed easily
 enough. For example, I might include a video in a sidebar or footer widget
 area using the embed Gutenberg block. This is great!

 Then I notice that ''every single post'' that a user visits which displays
 that widget area as part of its templates will get duplicated post_meta
 entries caching the embed. This quickly pollutes the post_meta table with
 hundreds of duplicate entries for the same embed on different posts.

 These "_oembed_xxx" and "_oembed_time_xxx" entries all have the same
 identifier for the "xxx" since they all come from the same embed in the
 widget area. Shouldn't these entries be associated with the widget area
 instead of the post?

 In fact, why are these oembed cache values stored in post_meta at all?
 Isn't this the kind of thing that deserves more universal storage in case
 the same embed is used on more than one page in any circumstance?

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Ticket URL: <https://core.trac.wordpress.org/ticket/56440>
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