[wp-trac] [WordPress Trac] #19679: Quicker image compression

[WordPress Trac]

#19679: Quicker image compression
--------------------------+-----------------------------
 Reporter:  mariusmandal  |      Owner:
     Type:  enhancement   |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Media         |    Version:  3.3
 Severity:  normal        |   Keywords:  has-patch
--------------------------+-----------------------------
 When uploading a 8MB photo, WP used 12 seconds to compress the image to 4
 sizes. After a quick mod, it uses 4 seconds to do the same job, without
 any noticable image quality loss (even though there is a small theoretical
 one)

 Shortly put:
 Sort sizes by area from large to small, and always create <this size> from
 the last image.
 (the image size sorting might be done better, without me knowing how to at
 the moment..)

 Why not do it like this? :)

 My modifications to wp-admin/includes/image.php, replacing line 122-128 :

 {{{
 foreach($sizes as $size => $info) {
         $newsizes[ $info['width']*$info['height'] ] = $info;
         $sizename[ $info['width']*$info['height'] ] = $size;
 }
 krsort($newsizes);
 foreach($newsizes as $res => $info)
         $sizes[$sizename[$res]] = $info;

 $sizes = apply_filters( 'intermediate_image_sizes_advanced', $sizes );

 foreach ($sizes as $size => $size_data ) {
         $resized = image_make_intermediate_size( $file,
 $size_data['width'], $size_data['height'], $size_data['crop'] );
         if ( $resized ) {
                 $metadata['sizes'][$size] = $resized;
                 $file = str_replace(substr($file, strrpos($file,'.')),
 '-'.$resized['width'].'x'.$resized['height'].substr($file,
 strrpos($file,'.')),
                                 $file);
         }
 }
 }}}

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Ticket URL: <http://core.trac.wordpress.org/ticket/19679>
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