From 196a7bc1ea8842b8c73954a625a0f5a80ef011b9 Mon Sep 17 00:00:00 2001 From: Serhiy Storchaka Date: Thu, 2 Feb 2017 16:54:45 +0200 Subject: Issue #29421: Make int.to_bytes() and int.from_bytes() slightly faster (10-20% for small integers). --- Objects/longobject.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/Objects/longobject.c b/Objects/longobject.c index f37fbd7..0bf6cee 100644 --- a/Objects/longobject.c +++ b/Objects/longobject.c @@ -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, -- cgit v0.12