Fast path for IncrementalNewlineDecoder.decode() in io.TextIOWrapper.read(-1)
Copy/paste code from textiowrapper_read_chunk().
diff --git a/Modules/_io/textio.c b/Modules/_io/textio.c
index 35bd922..70d062b 100644
--- a/Modules/_io/textio.c
+++ b/Modules/_io/textio.c
@@ -1513,8 +1513,13 @@
PyObject *decoded;
if (bytes == NULL)
goto fail;
- decoded = PyObject_CallMethodObjArgs(self->decoder, _PyIO_str_decode,
- bytes, Py_True, NULL);
+
+ if (Py_TYPE(self->decoder) == &PyIncrementalNewlineDecoder_Type)
+ decoded = _PyIncrementalNewlineDecoder_decode(self->decoder,
+ bytes, 1);
+ else
+ decoded = PyObject_CallMethodObjArgs(
+ self->decoder, _PyIO_str_decode, bytes, Py_True, NULL);
Py_DECREF(bytes);
if (decoded == NULL)
goto fail;