mirror of https://github.com/python/cpython
#1792: Improve performance of marshal.dumps() on large objects by increasing
the size of the buffer more quickly.
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@ -255,6 +255,14 @@ class BugsTestCase(unittest.TestCase):
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subtyp = type('subtyp', (typ,), {})
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self.assertRaises(ValueError, marshal.dumps, subtyp())
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# Issue #1792 introduced a change in how marshal increases the size of its
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# internal buffer; this test ensures that the new code is exercised.
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def test_large_marshal(self):
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size = int(1e6)
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testString = 'abc' * size
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marshal.dumps(testString)
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def test_main():
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test_support.run_unittest(IntTestCase,
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FloatTestCase,
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@ -65,7 +65,10 @@ w_more(int c, WFILE *p)
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if (p->str == NULL)
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return; /* An error already occurred */
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size = PyString_Size(p->str);
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newsize = size + 1024;
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newsize = size + size + 1024;
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if (newsize > 32*1024*1024) {
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newsize = size + 1024*1024;
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}
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if (_PyString_Resize(&p->str, newsize) != 0) {
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p->ptr = p->end = NULL;
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}
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