Add more details when releasing interned strings

Objects/stringobject.c

@@ -4969,6 +4969,7 @@ void _Py_ReleaseInternedStrings(void)
 	PyObject *keys;
 	PyStringObject *s;
 	Py_ssize_t i, n;
+	Py_ssize_t immortal_size = 0, mortal_size = 0;
 
 	if (interned == NULL || !PyDict_Check(interned))
 		return;
@@ -4983,8 +4984,9 @@ void _Py_ReleaseInternedStrings(void)
 	   give them their stolen references back, and then clear and DECREF
 	   the interned dict. */
 
-	fprintf(stderr, "releasing interned strings\n");
 	n = PyList_GET_SIZE(keys);
+	fprintf(stderr, "releasing %" PY_FORMAT_SIZE_T "d interned strings\n",
+		n);
 	for (i = 0; i < n; i++) {
 		s = (PyStringObject *) PyList_GET_ITEM(keys, i);
 		switch (s->ob_sstate) {
@@ -4993,15 +4995,20 @@ void _Py_ReleaseInternedStrings(void)
 			break;
 		case SSTATE_INTERNED_IMMORTAL:
 			s->ob_refcnt += 1;
+			immortal_size += s->ob_size;
 			break;
 		case SSTATE_INTERNED_MORTAL:
 			s->ob_refcnt += 2;
+			mortal_size += s->ob_size;
 			break;
 		default:
 			Py_FatalError("Inconsistent interned string state.");
 		}
 		s->ob_sstate = SSTATE_NOT_INTERNED;
 	}
+	fprintf(stderr, "total size of all interned strings: "
+			"%" PY_FORMAT_SIZE_T "d/%" PY_FORMAT_SIZE_T "d "
+			"mortal/immortal\n", mortal_size, immortal_size);
 	Py_DECREF(keys);
 	PyDict_Clear(interned);
 	Py_DECREF(interned);