[wp-trac] [WordPress Trac] #21668: WordPress still does not save jpeg as progressive jpeg

[WordPress Trac]

#21668: WordPress still does not save jpeg as progressive jpeg
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 Reporter:  _ck_                     |       Owner:
     Type:  enhancement              |      Status:  new
 Priority:  normal                   |   Milestone:  Future Release
Component:  Media                    |     Version:  3.4.1
 Severity:  normal                   |  Resolution:
 Keywords:  has-patch needs-testing  |
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Comment (by buley):

 For the sake of a more performant Internet, saving images as progressive
 when possible is a default option that I hope WordPress adopts.

 At parade.com we used 21668.4.patch for several months on the WP3.5 branch
 (https://core.trac.wordpress.org/attachment/ticket/21668/21668.4.patch).
 The improvements in 21668.5.patch
 (https://core.trac.wordpress.org/attachment/ticket/21668/21668.5.patch )
 are nice - allowing filter-based control - but I think the default `false`
 option is the wrong one for the Web. The changes in 21668.6
 (https://core.trac.wordpress.org/attachment/ticket/21668/21668.6.patch )
 seem more complex than required and are to me confusing, especially since
 it appears to be wrongly checking for a "PNG" mimetype when the $mimetype
 (correctly) is "image/png".

 Unfortunately I was not able to validate any of these patches as working
 on WordPress 3.8 with both ImageMagick and GD installed.

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Ticket URL: <https://core.trac.wordpress.org/ticket/21668#comment:29>
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