+ bottleneck and sending a patch (Sourceforge bug #2998119).
+
+11. Use only ctime in order to compare newness instead of both
+ ctime and mtime. This should both speed up dumping time and
+ correct some side-effect bugs (like dumping files with an mtime
+ in the future in every incremental backup). Thanks to
+ Kieran Clancy <codebeard@users.sourceforge.net> for reporting the
+ bug (Sourceforge bug #2999207).