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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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18
Lib/test/test_sys.py
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@ -363,6 +363,24 @@ class SysModuleTest(unittest.TestCase):
self.assertEqual(type(getattr(sys.flags, attr)), int, attr)
self.assert_(repr(sys.flags))
def test_clear_type_cache(self):
sys._clear_type_cache()
def test_compact_freelists(self):
sys._compact_freelists()
r = sys._compact_freelists()
# freed blocks shouldn't change
self.assertEqual(r[0][2], 0)
self.assertEqual(r[1][2], 0)
# fill freelists
ints = list(range(12000))
floats = [float(i) for i in ints]
del ints
del floats
# should free more than 200 blocks each
r = sys._compact_freelists()
self.assert_(r[0][2] > 200, r[0][2])
self.assert_(r[1][2] > 200, r[1][2])
def test_main():
test.test_support.run_unittest(SysModuleTest)