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Patch #1953

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I implemented the function sys._compact_freelists() and C API functions PyInt_/PyFloat_CompactFreeList() to compact the pre-allocated blocks of ints and floats. They allow the user to reduce the memory usage of a Python process that deals with lots of numbers.
The patch also renames sys._cleartypecache to sys._clear_type_cache
This commit is contained in:
Christian Heimes 2008-02-04 18:00:12 +00:00
parent a26cf9b760
commit 422051a367
11 changed files with 160 additions and 42 deletions
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47
Python/sysmodule.c
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@ -754,17 +754,6 @@ a 11-tuple where the entries in the tuple are counts of:\n\
10. Number of stack pops performed by call_function()"
);
static PyObject *
sys_cleartypecache(PyObject* self, PyObject* args)
{
PyType_ClearCache();
Py_RETURN_NONE;
}
PyDoc_STRVAR(cleartypecache_doc,
"_cleartypecache() -> None\n\
Clear the internal type lookup cache.");
#ifdef __cplusplus
extern "C" {
#endif
@ -783,12 +772,44 @@ extern PyObject *_Py_GetDXProfile(PyObject *, PyObject *);
}
#endif
static PyObject *
sys_clear_type_cache(PyObject* self, PyObject* args)
{
PyType_ClearCache();
Py_RETURN_NONE;
}
PyDoc_STRVAR(sys_clear_type_cache__doc__,
"_clear_type_cache() -> None\n\
Clear the internal type lookup cache.");
static PyObject *
sys_compact_freelists(PyObject* self, PyObject* args)
{
size_t isum, ibc, ibf;
size_t fsum, fbc, fbf;
PyInt_CompactFreeList(&ibc, &ibf, &isum);
PyFloat_CompactFreeList(&fbc, &fbf, &fsum);
return Py_BuildValue("(kkk)(kkk)", isum, ibc, ibf,
fsum, fbc, fbf);
}
PyDoc_STRVAR(sys_compact_freelists__doc__,
"_compact_freelists() -> ((remaing_objects, total_blocks, freed_blocks), ...)\n\
Compact the free lists of ints and floats.");
static PyMethodDef sys_methods[] = {
/* Might as well keep this in alphabetic order */
{"callstats", (PyCFunction)PyEval_GetCallStats, METH_NOARGS,
callstats_doc},
{"_cleartypecache", sys_cleartypecache, METH_NOARGS,
cleartypecache_doc},
{"_clear_type_cache", sys_clear_type_cache, METH_NOARGS,
sys_clear_type_cache__doc__},
{"_compact_freelists", sys_compact_freelists, METH_NOARGS,
sys_compact_freelists__doc__},
{"_current_frames", sys_current_frames, METH_NOARGS,
current_frames_doc},
{"displayhook", sys_displayhook, METH_O, displayhook_doc},