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Issue #4751: hashlib now releases the GIL when hashing large buffers

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(with a hardwired threshold of 2048 bytes), allowing better parallelization
on multi-CPU systems. Contributed by Lukas Lueg (ebfe) and Victor Stinner.
This commit is contained in:
Antoine Pitrou 2009-01-08 21:17:16 +00:00
parent 5bad41eefc
commit bcd5cbe01e
4 changed files with 176 additions and 91 deletions
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13
Lib/test/test_hashlib.py
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@ -198,6 +198,19 @@ class HashLibTestCase(unittest.TestCase):
"e718483d0ce769644e2e42c7bc15b4638e1f98b13b2044285632a803afa973eb"+
"de0ff244877ea60a4cb0432ce577c31beb009c5c2c49aa2e4eadb217ad8cc09b")
def test_gil(self):
# Check things work fine with an input larger than the size required
# for multithreaded operation (which is hardwired to 2048).
gil_minsize = 2048
m = hashlib.md5()
m.update(b'1')
m.update(b'#' * gil_minsize)
m.update(b'1')
self.assertEquals(m.hexdigest(), 'cb1e1a2cbc80be75e19935d621fb9b21')
m = hashlib.md5(b'x' * gil_minsize)
self.assertEquals(m.hexdigest(), 'cfb767f225d58469c5de3632a8803958')
def test_main():
support.run_unittest(HashLibTestCase)