Ticket #23102: timing_code.diff

wp-admin/includes/ajax-actions.php

@@ -1852 +1852 @@
         $posts = array_map( 'wp_prepare_attachment_for_js', $query->posts );
         $posts = array_filter( $posts );
 
+        // Timing code start
+        global $attachment_timing_array;
+        
+        if ( ! empty( $attachment_timing_array ) ) {
+                $count = count( $attachment_timing_array );
+                $avg_time = round( 1000 * array_sum( $attachment_timing_array ) / $count, 3 ); // (ms)
+                $text = "Avg time " . $avg_time . " ms based on " . $count . " thumbnails or medium-sized images.\r\n";
+                file_put_contents( '../timing_dump.txt', $text , FILE_APPEND );
+        }
+        // Timing code end
+        
         wp_send_json_success( $posts );
 }
 

wp-includes/media.php

@@ -1393 +1393 @@
                                 // We have the actual image size, but might need to further constrain it if content_width is narrower.
                                 // This is not necessary for thumbnails and medium size.
                                 if ( 'thumbnail' == $size || 'medium' == $size ) {
+                                        // Timer start
+                                        $time_start = microtime( true );
+                                        
+                                        /* Option 1: Original 3.5.0 code
                                         $width = $size_meta['width'];
                                         $height = $size_meta['height'];
+                                        */
+                                        
+                                        /* Option 2: Proposed 3.5.1 code */
+                                        list( $width, $height ) = image_constrain_size_for_editor( $size_meta['width'], $size_meta['height'], $size, 'edit' );
+                                        
+                                        /* Option 3: Equivalent 3.4 code
+                                        list( $img_src, $width, $height ) = image_downsize( $attachment->ID, $size );
+                                        */
+                                        
+                                        // Timer end
+                                        $time_end = microtime( true );
+                                        global $attachment_timing_array;
+                                        $attachment_timing_array[] = $time_end - $time_start;
                                 } else {
                                         list( $width, $height ) = image_constrain_size_for_editor( $size_meta['width'], $size_meta['height'], $size, 'edit' );
                                 }