Index: branches/5.2.x/core/units/helpers/image_helper.php
===================================================================
--- branches/5.2.x/core/units/helpers/image_helper.php
+++ branches/5.2.x/core/units/helpers/image_helper.php
@@ -123,6 +123,15 @@
 					$params['max_height'] = $params['target_height'];
 				}
 
+				// Optimize, because when cropping from center without resize we'll get same image back.
+				if ( !$needs_resize
+					&& isset($params['crop_x'])
+					&& $params['crop_x'] == 'c'
+					&& $params['crop_y'] == 'c'
+				) {
+					unset($params['crop_x'], $params['crop_y'], $params['fill']);
+				}
+
 				$src_path = dirname($src_image);
 				$transform_keys = Array ('crop_x', 'crop_y', 'fill', 'wm_filename');