[wp-trac] [WordPress Trac] #36477: Responsive images(srcset) feature makes images fatter.

[WordPress Trac]

#36477: Responsive images(srcset) feature makes images fatter.
-------------------------------------+-----------------------------
 Reporter:  peterdavehello           |       Owner:  joemcgill
     Type:  defect (bug)             |      Status:  accepted
 Priority:  normal                   |   Milestone:  Future Release
Component:  Media                    |     Version:  4.4.2
 Severity:  normal                   |  Resolution:
 Keywords:  has-patch needs-testing  |     Focuses:  performance
-------------------------------------+-----------------------------
Changes (by codex-m):

 * keywords:  needs-patch => has-patch needs-testing


Comment:

 @joemcgill I think we can handle this in coming 4.6. The trick is to check
 for unique colors before resizing. If its 256 or below, its indexed color
 type or already optimized. We implement a file size optimizing filter. In
 my test, `FILTER_POINT` works best.

 I did several tests and it handles already compressed PNG images very
 well. So it means that after resizing, resulting file size is not very
 large. Since the number of unique colors will be preserved while not
 affecting quality ;)

 Let me know what you think. Cheers!

 Emerson

--
Ticket URL: <https://core.trac.wordpress.org/ticket/36477#comment:14>
WordPress Trac <https://core.trac.wordpress.org/>
WordPress publishing platform