[wp-trac] [WordPress Trac] #55443: Create WebP sub-sizes and use for output

[WordPress Trac]

#55443: Create WebP sub-sizes and use for output
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 Reporter:  adamsilverstein                      |       Owner:
                                                 |  adamsilverstein
     Type:  enhancement                          |      Status:  assigned
 Priority:  normal                               |   Milestone:  6.1
Component:  Media                                |     Version:  6.0
 Severity:  normal                               |  Resolution:
 Keywords:  has-unit-tests needs-dev-note        |     Focuses:
  needs-docs needs-user-docs needs-patch 2nd-    |  performance
  opinion needs-testing                          |
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Comment (by adamsilverstein):

 > Is there any data about how much more resources (memory, processing
 time, etc.) are needed when uploading different image sizes? Any estimate
 about how many sites may be affected by that? Any suggestions on how to
 deal with it? Do you know what happens when post-processing of an uploaded
 image fails?

 In general WebPs are a little more resource intensive to generate vs.
 JPEGs. Only sites that have WebP support will be affected though, and
 while we expect support is widespread since it has been available for so
 long, but we don't have hard data (we will start gathering data since
 #48116).

 The additional resources at upload time need to be weighed against the
 reduced resources of serving the smaller WebP image, especially since
 serving typically occurs several orders of magnitude more frequently than
 uploading.

 If uploading fails after all the retries, the user has the same experience
 as currently: they are left with a broken, unusable image. That can
 probably be fixed, although I don't think this change will increases
 failure rates.

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Ticket URL: <https://core.trac.wordpress.org/ticket/55443#comment:119>
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