Restore fast path for integers

python · vstinner · May 31, 2025 · May 10, 2025 · May 10, 2025 · May 10, 2025
commit ab1aa4256faa93675c28dc79f64d43830f7056a7
diff --git a/Modules/_json.c b/Modules/_json.c
@@ -1482,6 +1482,9 @@
         return _steal_accumulate(writer, encoded);
     }
     else if (PyLong_Check(obj)) {
+        if (PyLong_CheckExact(obj)) {
+            return _PyLong_FormatWriter(writer, obj, 10, 0);
+        }
         PyObject *encoded = PyLong_Type.tp_repr(obj);
         if (encoded == NULL)
             return -1;