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

[WordPress Trac]

#21668: WordPress does not save jpeg as progressive jpeg
-------------------------+-----------------------------
 Reporter:  _ck_         |       Owner:
     Type:  enhancement  |      Status:  assigned
 Priority:  normal       |   Milestone:  Future Release
Component:  Media        |     Version:  3.4.1
 Severity:  normal       |  Resolution:
 Keywords:  needs-patch  |     Focuses:
-------------------------+-----------------------------

Comment (by bahia0019):

 Replying to [comment:22 nacin]:
 > While progressive JPEGs can be smaller, they are not always desired from
 an aesthetics standpoint.

 Yes! FOUT anyone? Now FOUP. Flash of Unstyled Picture...
 Progressive JPGs alter the aesthetic experience of a site. And while it
 may be something for a site owner to consider, it should be their choice
 on whether to utilize or not.
 Similarly, lazy loaders are not baked into Core.
 The psychology of how people interact with progressive jpegs can be read
 here:
 http://www.webperformancetoday.com/2014/09/17/progressive-image-rendering-
 good-evil/
 TL;DR: the brain has to figure out what they're loooking at when they see
 a blurry image, then acknowledge what the object actually is when it's
 finally rendered. (This is very much in contrast with the Don't Make Me
 Think philosophy).

 I could see this potentially as an option in the Media settings, but then
 you're dealing with regenerating all the jpegs (and doing the same when/if
 switching back).

 This is something a site owner should be responsible for IF they want to
 pursue it. And when the average Progressive JPG only saves a few
 percentage points, there are other areas to focus on. Lossless compression
 saves way more (25-60% in cases) than Progressive JPGs, without the
 aesthetic issues.

 Progressive JPEGs have been around forever, but we have better technology
 that allows for a much superior user experience. You can't trade
 usability/experience for a small performance improvement, when there are
 better options now.

 As a photographer, and as a internet user, I'm inclined to agree with
 Nacin, and not support this.

--
Ticket URL: <https://core.trac.wordpress.org/ticket/21668#comment:43>
WordPress Trac <https://core.trac.wordpress.org/>
WordPress publishing platform