diff --git a/Lib/pprint.py b/Lib/pprint.py
index d91421f0a..34ed12637 100644
--- a/Lib/pprint.py
+++ b/Lib/pprint.py
@@ -149,8 +149,9 @@ class PrettyPrinter:
         self._underscore_numbers = underscore_numbers
 
     def pprint(self, object):
-        self._format(object, self._stream, 0, 0, {}, 0)
-        self._stream.write("\n")
+        if self._stream is not None:
+            self._format(object, self._stream, 0, 0, {}, 0)
+            self._stream.write("\n")
 
     def pformat(self, object):
         sio = _StringIO()
@@ -636,19 +637,6 @@ def _recursion(object):
             % (type(object).__name__, id(object)))
 
 
-def _perfcheck(object=None):
-    import time
-    if object is None:
-        object = [("string", (1, 2), [3, 4], {5: 6, 7: 8})] * 100000
-    p = PrettyPrinter()
-    t1 = time.perf_counter()
-    p._safe_repr(object, {}, None, 0, True)
-    t2 = time.perf_counter()
-    p.pformat(object)
-    t3 = time.perf_counter()
-    print("_safe_repr:", t2 - t1)
-    print("pformat:", t3 - t2)
-
 def _wrap_bytes_repr(object, width, allowance):
     current = b''
     last = len(object) // 4 * 4
@@ -665,6 +653,3 @@ def _wrap_bytes_repr(object, width, allowance):
             current = candidate
     if current:
         yield repr(current)
-
-if __name__ == "__main__":
-    _perfcheck()