diff -r af402c6b90db -r 15a1e37f80bd mercurial/profiling.py
--- a/mercurial/profiling.py	Fri Jun 01 11:23:27 2018 +0200
+++ b/mercurial/profiling.py	Fri Jun 01 17:27:58 2018 +0200
@@ -101,7 +101,8 @@
     else:
         ui.warn(_("invalid sampling frequency '%s' - ignoring\n") % freq)
 
-    statprof.start(mechanism='thread')
+    track = ui.config('profiling', 'time-track')
+    statprof.start(mechanism='thread', track=track)
 
     try:
         yield