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Speed up _decimal by 30-40% for numerical workloads by improving the cache 

locality for regularly sized coefficients.
This commit is contained in:
Stefan Krah 2012-04-09 20:24:57 +02:00
parent 94ef3e4c1d
commit dd159ce606
1 changed files with 18 additions and 16 deletions
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34
Modules/_decimal/_decimal.c
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@ -55,9 +55,13 @@
#define BOUNDS_CHECK(x, MIN, MAX) x = (x < MIN || MAX < x) ? MAX : x
/* _Py_DEC_MINALLOC >= MPD_MINALLOC */
#define _Py_DEC_MINALLOC 4
typedef struct {
PyObject_HEAD
mpd_t *dec;
mpd_t dec;
mpd_uint_t data[_Py_DEC_MINALLOC];
} PyDecObject;
typedef struct {
@ -90,7 +94,7 @@ static PyTypeObject PyDecContextManager_Type;
#define PyDec_Check(v) PyObject_TypeCheck(v, &PyDec_Type)
#define PyDecSignalDict_Check(v) (Py_TYPE(v) == PyDecSignalDict_Type)
#define PyDecContext_Check(v) PyObject_TypeCheck(v, &PyDecContext_Type)
#define MPD(v) (((PyDecObject *)v)->dec)
#define MPD(v) (&((PyDecObject *)v)->dec)
#define SdFlagAddr(v) (((PyDecSignalDictObject *)v)->flags)
#define SdFlags(v) (*((PyDecSignalDictObject *)v)->flags)
#define CTX(v) (&((PyDecContextObject *)v)->ctx)
@ -1789,35 +1793,33 @@ static PyTypeObject PyDecContextManager_Type =
static PyObject *
PyDecType_New(PyTypeObject *type)
{
PyObject *dec;
PyDecObject *dec;
if (type == &PyDec_Type) {
dec = (PyObject *)PyObject_New(PyDecObject, &PyDec_Type);
dec = PyObject_New(PyDecObject, &PyDec_Type);
}
else {
dec = type->tp_alloc(type, 0);
dec = (PyDecObject *)type->tp_alloc(type, 0);
}
if (dec == NULL) {
return NULL;
}
MPD(dec) = mpd_qnew();
if (MPD(dec) == NULL) {
Py_DECREF(dec);
PyErr_NoMemory();
return NULL;
}
MPD(dec)->flags = MPD_STATIC|MPD_STATIC_DATA;
MPD(dec)->exp = 0;
MPD(dec)->digits = 0;
MPD(dec)->len = 0;
MPD(dec)->alloc = _Py_DEC_MINALLOC;
MPD(dec)->data = dec->data;
return dec;
return (PyObject *)dec;
}
#define dec_alloc() PyDecType_New(&PyDec_Type)
static void
dec_dealloc(PyObject *dec)
{
if (MPD(dec)) {
mpd_del(MPD(dec));
}
mpd_del(MPD(dec));
Py_TYPE(dec)->tp_free(dec);
}
@ -5342,7 +5344,7 @@ PyInit__decimal(void)
mpd_reallocfunc = PyMem_Realloc;
mpd_callocfunc = mpd_callocfunc_em;
mpd_free = PyMem_Free;
mpd_setminalloc(4);
mpd_setminalloc(_Py_DEC_MINALLOC);
/* Init types */