--- a/hgext/notify.py	Thu Apr 19 00:55:36 2018 -0400
+++ b/hgext/notify.py	Wed Apr 18 15:04:12 2018 +0200
@@ -469,8 +469,7 @@
     count = 0
     author = ''
     if hooktype == 'changegroup' or hooktype == 'outgoing':
-        start, end = ctx.rev(), len(repo)
-        for rev in xrange(start, end):
+        for rev in repo.changelog.revs(start=ctx.rev()):
             if n.node(repo[rev]):
                 count += 1
                 if not author: