Patch #1953
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
diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index 41830b9..8e27844 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -754,17 +754,6 @@
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 @@
}
#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},