diff --git a/contrib/perf.py b/contrib/perf.py
--- a/contrib/perf.py
+++ b/contrib/perf.py
@@ -267,6 +267,30 @@
     )
 except (ImportError, AttributeError):
     pass
+except TypeError:
+    # compatibility fix for a11fd395e83f
+    # hg version: 5.2
+    configitem(b'perf', b'presleep',
+        default=mercurial.configitems.dynamicdefault,
+    )
+    configitem(b'perf', b'stub',
+        default=mercurial.configitems.dynamicdefault,
+    )
+    configitem(b'perf', b'parentscount',
+        default=mercurial.configitems.dynamicdefault,
+    )
+    configitem(b'perf', b'all-timing',
+        default=mercurial.configitems.dynamicdefault,
+    )
+    configitem(b'perf', b'pre-run',
+        default=mercurial.configitems.dynamicdefault,
+    )
+    configitem(b'perf', b'profile-benchmark',
+        default=mercurial.configitems.dynamicdefault,
+    )
+    configitem(b'perf', b'run-limits',
+        default=mercurial.configitems.dynamicdefault,
+    )
 
 def getlen(ui):
     if ui.configbool(b"perf", b"stub", False):