[wp-trac] [WordPress Trac] #50866: Media Uploader Blows Up File Sizes

[WordPress Trac]

#50866: Media Uploader Blows Up File Sizes
-------------------------------------+-------------------------------------
 Reporter:  hvar                     |       Owner:  (none)
     Type:  defect (bug)             |      Status:  new
 Priority:  normal                   |   Milestone:  5.9
Component:  Media                    |     Version:  5.4.2
 Severity:  major                    |  Resolution:
 Keywords:  has-patch has-unit-      |     Focuses:  administration,
  tests dev-feedback needs-testing   |  performance
  has-testing-info                   |
-------------------------------------+-------------------------------------

Comment (by ashfame):

 Running `WP 5.9-alpha-51272-src`, I took a 512x512 png image and ran
 through optimization to reduce its size to 1.5K and when I uploaded this
 image `512x512-2.png` directly to the media library, an additional 512x512
 image was indeed created even though I had set the medium size as 512x512.
 And we can see the size of that copy is bigger than the original size
 (3.2K).

 {{{
 -rw-r--r--  1 ashfame  staff   902B Aug  5 18:45 512x512-2-150x150.png
 -rw-r--r--  1 ashfame  staff   3.2K Aug  5 18:45 512x512-2-512x512.png
 -rw-r--r--  1 ashfame  staff   1.5K Aug  5 18:45 512x512-2.png
 }}}


 Exactly the same thing happened when I uploaded it directly from WordPress
 block editor (without Gutenberg plugin) while creating a post. But the
 image that was actually added in the post was the original image. So, this
 issue couldn't be reproduced.

 I took a quick look at the patch but chose not to test it at all as its
 about changing the logic of choosing which image to select for a
 particular size (which doesn't seem to be an issue anymore) and nothing
 about preventing the additional image size from being generated (which is
 still an issue, though a trivial one).

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Ticket URL: <https://core.trac.wordpress.org/ticket/50866#comment:12>
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