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Issue #29421: Make int.to_bytes() and int.from_bytes() slightly faster

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(10-20% for small integers).
This commit is contained in:
Serhiy Storchaka 2017-02-02 16:54:45 +02:00
parent c0f59ad145
commit 196a7bc1ea
1 changed files with 7 additions and 4 deletions
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11
Objects/longobject.c
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@ -22,6 +22,9 @@ class int "PyObject *" "&PyLong_Type"
#define NSMALLNEGINTS 5
#endif
_Py_IDENTIFIER(little);
_Py_IDENTIFIER(big);
/* convert a PyLong of size 1, 0 or -1 to an sdigit */
#define MEDIUM_VALUE(x) (assert(-1 <= Py_SIZE(x) && Py_SIZE(x) <= 1), \
Py_SIZE(x) < 0 ? -(sdigit)(x)->ob_digit[0] : \
@ -5198,9 +5201,9 @@ int_to_bytes_impl(PyObject *self, Py_ssize_t length, PyObject *byteorder,
int little_endian;
PyObject *bytes;
if (_PyUnicode_EqualToASCIIString(byteorder, "little"))
if (_PyUnicode_EqualToASCIIId(byteorder, &PyId_little))
little_endian = 1;
else if (_PyUnicode_EqualToASCIIString(byteorder, "big"))
else if (_PyUnicode_EqualToASCIIId(byteorder, &PyId_big))
little_endian = 0;
else {
PyErr_SetString(PyExc_ValueError,
@ -5258,9 +5261,9 @@ int_from_bytes_impl(PyTypeObject *type, PyObject *bytes_obj,
int little_endian;
PyObject *long_obj, *bytes;
if (_PyUnicode_EqualToASCIIString(byteorder, "little"))
if (_PyUnicode_EqualToASCIIId(byteorder, &PyId_little))
little_endian = 1;
else if (_PyUnicode_EqualToASCIIString(byteorder, "big"))
else if (_PyUnicode_EqualToASCIIId(byteorder, &PyId_big))
little_endian = 0;
else {
PyErr_SetString(PyExc_ValueError,