diff -r 49c7b701fdc2 -r 89703e6151e7 mercurial/configitems.py
--- a/mercurial/configitems.py	Wed Oct 17 14:47:01 2018 +0200
+++ b/mercurial/configitems.py	Wed Oct 24 22:24:10 2018 -0400
@@ -923,7 +923,7 @@
     default='hotpath',
 )
 coreconfigitem('profiling', 'time-track',
-    default='real',
+    default=dynamicdefault,
 )
 coreconfigitem('profiling', 'type',
     default='stat',