id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc
21498,PNG optimizations,demetris,,"I run a series of recompression commands on all PNG files found currently in trunk (rev. 21421, 121 images in total), and in some cases I got results that I think we should use.

I recorded the gains in a spreadsheet, which you can see here:

[URL]

The PNG files, along with the originals, are in the ZIP archive I link. Originals are distinguished by their double extension: .ORIG.png. Note that the ZIP contains all pairs of original and recompressed images; that is, it also includes those where no gain was achieved.

[URL]

In a couple of cases I noticed that the recompression messed up the images. I put a note for those in the Remarks column of the spreadsheet. Maybe there are more problematic cases.

The programs and arguments I used were:

 *  `optipng -o7`
 *  `advpng -z -4` (advpng is part of the AdvanceCOMP suite)
 *  `optipng -o7` (a second time)

Cheers!",enhancement,closed,normal,,Performance,,normal,duplicate,has-patch,dkikizas@…