Micro-optimizations.
* List/Tuple checkexact is faster for the common case.
* Testing for Py_True and Py_False can be inlined for faster looping.
diff --git a/Python/ceval.c b/Python/ceval.c
index 9a5d039..5286d25 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -1655,7 +1655,7 @@
case UNPACK_SEQUENCE:
v = POP();
- if (PyTuple_Check(v)) {
+ if (PyTuple_CheckExact(v)) {
if (PyTuple_Size(v) != oparg) {
PyErr_SetString(PyExc_ValueError,
"unpack tuple of wrong size");
@@ -1669,7 +1669,7 @@
}
}
}
- else if (PyList_Check(v)) {
+ else if (PyList_CheckExact(v)) {
if (PyList_Size(v) != oparg) {
PyErr_SetString(PyExc_ValueError,
"unpack list of wrong size");
@@ -1975,7 +1975,14 @@
continue;
case JUMP_IF_FALSE:
- err = PyObject_IsTrue(TOP());
+ w = TOP();
+ if (w == Py_True)
+ continue;
+ if (w == Py_False) {
+ JUMPBY(oparg);
+ continue;
+ }
+ err = PyObject_IsTrue(w);
if (err > 0)
err = 0;
else if (err == 0)
@@ -1985,7 +1992,14 @@
continue;
case JUMP_IF_TRUE:
- err = PyObject_IsTrue(TOP());
+ w = TOP();
+ if (w == Py_False)
+ continue;
+ if (w == Py_True) {
+ JUMPBY(oparg);
+ continue;
+ }
+ err = PyObject_IsTrue(w);
if (err > 0) {
err = 0;
JUMPBY(oparg);