diff -r 569eb5d0420d -r 6c3798b4597f mercurial/revlog.py
--- a/mercurial/revlog.py	Tue Sep 19 23:13:16 2023 +0200
+++ b/mercurial/revlog.py	Tue Sep 19 23:14:01 2023 +0200
@@ -919,6 +919,7 @@
                 nodemaputil.setup_persistent_nodemap(transaction, self)
 
     def clearcaches(self):
+        """Clear in-memory caches"""
         self._revisioncache = None
         self._chainbasecache.clear()
         self._segmentfile.clear_cache()