[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:  3.7
Component:  Media                              |     Version:  3.4.1
 Severity:  normal                             |  Resolution:
 Keywords:  has-patch 3.7-early needs-testing  |
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Comment (by pmeenan):

 Replying to [comment:18 DH-Shredder]:
 > @pmeenan: Thanks for the patch!
 >
 > @markoheijnen, @derekspringer and I we chatted about this a bit at the
 Contributor Day at WCSF.
 >
 > Notes from the conversation:
 > - This is still something we want to do.
 > - Initially it's something we'd like to introduce as an optional feature
 via a filter, due to the increase in file sizes, but we could it consider
 later becoming a default for JPG alone.
 > - We'd like to see support for at least PNG as well, since there's no
 reason not to support it via the framework when it's optional, and PNG is
 a commonly used format.  As you noted, this would not be something done by
 default either, due to the increase in file size.

 FWIW, the progressive JPEGs should almost always be smaller than baseline
 (unlike PNG and GIF).  In Stoyan's testing above, 75% of JPEG's that were
 under 10KB were smaller as progressive and 94% of JPEG's over 10KB were
 smaller as progressive.  That's largely why I killed the PNG and GIF
 support in my version of the patch and had it turned on by default for
 JPEG.

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Ticket URL: <http://core.trac.wordpress.org/ticket/21668#comment:21>
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