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SF #561244, Micro optimizations

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Initialize the small integers and __builtins__ in startup.
This removes some if conditions.
Change XDECREF to DECREF for values which shouldn't be NULL.
This commit is contained in:
Neal Norwitz 2002-12-30 22:29:22 +00:00
parent 83f898c86c
commit c91ed400e0
5 changed files with 44 additions and 19 deletions
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33
Objects/intobject.c
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@ -78,7 +78,7 @@ fill_free_list(void)
#define NSMALLPOSINTS 100
#endif
#ifndef NSMALLNEGINTS
#define NSMALLNEGINTS 1
#define NSMALLNEGINTS 5
#endif
#if NSMALLNEGINTS + NSMALLPOSINTS > 0
/* References to small integers are saved in this array so that they
@ -97,8 +97,8 @@ PyInt_FromLong(long ival)
{
register PyIntObject *v;
#if NSMALLNEGINTS + NSMALLPOSINTS > 0
if (-NSMALLNEGINTS <= ival && ival < NSMALLPOSINTS &&
(v = small_ints[ival + NSMALLNEGINTS]) != NULL) {
if (-NSMALLNEGINTS <= ival && ival < NSMALLPOSINTS) {
v = small_ints[ival + NSMALLNEGINTS];
Py_INCREF(v);
#ifdef COUNT_ALLOCS
if (ival >= 0)
@ -118,13 +118,6 @@ PyInt_FromLong(long ival)
free_list = (PyIntObject *)v->ob_type;
PyObject_INIT(v, &PyInt_Type);
v->ob_ival = ival;
#if NSMALLNEGINTS + NSMALLPOSINTS > 0
if (-NSMALLNEGINTS <= ival && ival < NSMALLPOSINTS) {
/* save this one for a following allocation */
Py_INCREF(v);
small_ints[ival + NSMALLNEGINTS] = v;
}
#endif
return (PyObject *) v;
}
@ -945,6 +938,26 @@ PyTypeObject PyInt_Type = {
(freefunc)int_free, /* tp_free */
};
int
PyInt_Init(void)
{
PyIntObject *v;
int ival;
#if NSMALLNEGINTS + NSMALLPOSINTS > 0
for (ival = -NSMALLNEGINTS; ival < NSMALLPOSINTS; ival++) {
if ((free_list = fill_free_list()) == NULL)
return 0;
/* PyObject_New is inlined */
v = free_list;
free_list = (PyIntObject *)v->ob_type;
PyObject_INIT(v, &PyInt_Type);
v->ob_ival = ival;
small_ints[ival + NSMALLNEGINTS] = v;
}
#endif
return 1;
}
void
PyInt_Fini(void)
{