Issue #19512: add _PyUnicode_CompareWithId() function

_PyUnicode_CompareWithId() is faster than PyUnicode_CompareWithASCIIString()
when both strings are equal and interned.

Add also _PyId_builtins identifier for "builtins" common string.

1 files changed, 9 insertions, 0 deletions

diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 574b57a259..4ae73771f2 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -10566,6 +10566,15 @@ PyUnicode_Compare(PyObject *left, PyObject *right)
 }
 
 int
+_PyUnicode_CompareWithId(PyObject *left, _Py_Identifier *right)
+{
+    PyObject *right_str = _PyUnicode_FromId(right);   /* borrowed */
+    if (right_str == NULL)
+        return -1;
+    return PyUnicode_Compare(left, right_str);
+}
+
+int
 PyUnicode_CompareWithASCIIString(PyObject* uni, const char* str)
 {
     Py_ssize_t i;