Partial Revert: bring back some comments

source/blender/blenkernel/intern/library.c

@@ -1982,6 +1982,15 @@ bool new_id(ListBase *lb, ID *id, const char *tname)
 	result = check_for_dupid(lb, id, name);
 	strcpy(id->name + 2, name);
 
+	/* This was in 2.43 and previous releases
+	 * however all data in blender should be sorted, not just duplicate names
+	 * sorting should not hurt, but noting just incase it alters the way other
+	 * functions work, so sort every time */
+#if 0
+	if (result)
+		id_sort_by_name(lb, id);
+#endif
+
 	id_sort_by_name(lb, id);
 
 	return result;

source/blender/blenkernel/intern/movieclip.c

@@ -1155,6 +1155,17 @@ bool BKE_movieclip_has_frame(MovieClip *clip, MovieClipUser *user)
 
 void BKE_movieclip_get_size(MovieClip *clip, MovieClipUser *user, int *width, int *height)
 {
+#if 0
+	/* originally was needed to support image sequences with different image dimensions,
+	 * which might be useful for such things as reconstruction of unordered image sequence,
+	 * or painting/rotoscoping of non-equal-sized images, but this ended up in unneeded
+	 * cache lookups and even unwanted non-proxied files loading when doing mask parenting,
+	 * so let's disable this for now and assume image sequence consists of images with
+	 * equal sizes (sergey)
+	 * TODO(sergey): Support reading sequences of different resolution.
+	 */
+	if (user->framenr == clip->lastframe) {
+#endif
 	if (clip->lastsize[0] != 0 && clip->lastsize[1] != 0) {
 		*width = clip->lastsize[0];
 		*height = clip->lastsize[1];