[wp-trac] [WordPress Trac] #58996: Expand "imagemin" Grunt task to cover default themes

[WordPress Trac]

#58996: Expand "imagemin" Grunt task to cover default themes
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 Reporter:  azaozz            |       Owner:  swissspidy
     Type:  enhancement       |      Status:  closed
 Priority:  normal            |   Milestone:  6.5
Component:  Build/Test Tools  |     Version:
 Severity:  normal            |  Resolution:  fixed
 Keywords:  has-patch commit  |     Focuses:
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Comment (by afercia):

 > imagemin is supposed to do lossless compression according to the
 documentation, so quality shouldn't decrease.

 Maybe I wasn't clear.
 When the image size actually increases, that means that some pixels are
 _added_ to the image (which is already optimized, it's not the original
 high-quality image). That means imagemin actualy 'rebuilds' some pixels
 adn adds them to the image, as a result of some interpolation process.
 These 'rebuilt' pixels can't in any way _improve_ the quality of the
 image.

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Ticket URL: <https://core.trac.wordpress.org/ticket/58996#comment:12>
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