[wp-trac] [WordPress Trac] #47583: Generate image thumbnails when needed, not immediately after uploading a new image

[WordPress Trac]

#47583: Generate image thumbnails when needed, not immediately after uploading a
new image
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 Reporter:  Millionleaves    |      Owner:  (none)
     Type:  feature request  |     Status:  new
 Priority:  normal           |  Milestone:  Awaiting Review
Component:  Media            |    Version:  trunk
 Severity:  normal           |   Keywords:
  Focuses:  performance      |
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 WordPress currently generates all possible thumbnails for each image that
 is uploaded. Many of those thumbnails are not required, and are never
 used.

 An improvement would be to generate each thumbnail when it is actually
 requested during a page load. This would avoid the generation of unwanted
 thumbnails, and save petabytes of disk storage in WordPress hosting plans
 the world over.

 This has been discussed and attempted through code snippets and plugins
 but there is no solution that I can find today to achieve this easily.
 Plus, it is something that probably belongs in core.

 https://wordpress.stackexchange.com/questions/53344/how-to-generate-
 thumbnails-when-needed-only

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Ticket URL: <https://core.trac.wordpress.org/ticket/47583>
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