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Issue #15381: Optimized io.BytesIO to make less allocations and copyings.

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This commit is contained in:
Serhiy Storchaka 2015-02-03 11:30:10 +02:00
parent 83e802796c
commit 87d0b45485
4 changed files with 159 additions and 189 deletions
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5
Lib/test/test_memoryio.py
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@ -718,12 +718,11 @@ class CBytesIOTest(PyBytesIOTest):
@support.cpython_only
def test_sizeof(self):
basesize = support.calcobjsize('P2nN2PnP')
basesize = support.calcobjsize('P2n2Pn')
check = self.check_sizeof
self.assertEqual(object.__sizeof__(io.BytesIO()), basesize)
check(io.BytesIO(), basesize )
check(io.BytesIO(b'a'), basesize + 1 )
check(io.BytesIO(b'a' * 1000), basesize + 1000)
check(io.BytesIO(b'a' * 1000), basesize + sys.getsizeof(b'a' * 1000))
# Various tests of copy-on-write behaviour for BytesIO.