diff --git a/hgext3rd/noverify.py b/hgext3rd/noverify.py
new file mode 100644
--- /dev/null
+++ b/hgext3rd/noverify.py
@@ -0,0 +1,30 @@
+# noverify.py
+#
+# Copyright 2017 Facebook, Inc.
+#
+# This software may be used and distributed according to the terms of the
+# GNU General Public License version 2 or any later version.
+
+"""
+disables hg verify
+
+Verify can be extremely slow on large repos, so this extension disables it.
+
+This also disables the verification step of rollback.
+"""
+
+from __future__ import absolute_import
+
+from mercurial import (
+    extensions,
+    hg,
+)
+
+testedwith = 'ships-with-fb-hgext'
+
+def extsetup(ui):
+    extensions.wrapfunction(hg, 'verify', verify)
+
+def verify(self, repo):
+    repo.ui.warn(("not running deep verify of repo; too expensive\n"))
+    return 0