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Issue #21233: Add new C functions: PyMem_RawCalloc(), PyMem_Calloc(),

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PyObject_Calloc(), _PyObject_GC_Calloc(). bytes(int) and bytearray(int) are now
using ``calloc()`` instead of ``malloc()`` for large objects which is faster
and use less memory (until the bytearray buffer is filled with data).
This commit is contained in:
Victor Stinner 2014-05-02 22:31:14 +02:00
parent d50c3f3f3a
commit db067af12a
11 changed files with 366 additions and 71 deletions
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24
Modules/gcmodule.c
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@ -1703,15 +1703,19 @@ PyObject_GC_UnTrack(void *op)
_PyObject_GC_UNTRACK(op);
}
PyObject *
_PyObject_GC_Malloc(size_t basicsize)
static PyObject *
_PyObject_GC_Alloc(int use_calloc, size_t basicsize)
{
PyObject *op;
PyGC_Head *g;
size_t size;
if (basicsize > PY_SSIZE_T_MAX - sizeof(PyGC_Head))
return PyErr_NoMemory();
g = (PyGC_Head *)PyObject_MALLOC(
sizeof(PyGC_Head) + basicsize);
size = sizeof(PyGC_Head) + basicsize;
if (use_calloc)
g = (PyGC_Head *)PyObject_Calloc(1, size);
else
g = (PyGC_Head *)PyObject_Malloc(size);
if (g == NULL)
return PyErr_NoMemory();
g->gc.gc_refs = 0;
@ -1730,6 +1734,18 @@ _PyObject_GC_Malloc(size_t basicsize)
return op;
}
PyObject *
_PyObject_GC_Malloc(size_t basicsize)
{
return _PyObject_GC_Alloc(0, basicsize);
}
PyObject *
_PyObject_GC_Calloc(size_t basicsize)
{
return _PyObject_GC_Alloc(1, basicsize);
}
PyObject *
_PyObject_GC_New(PyTypeObject *tp)
{