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a871ef2b3e
Based on lsprof (patch #1212837) by Brett Rosen and Ted Czotter. With further editing by Michael Hudson and myself. History in svn repo: http://codespeak.net/svn/user/arigo/hack/misc/lsprof * Module/_lsprof.c is the internal C module, Lib/cProfile.py a wrapper. * pstats.py updated to display cProfile's caller/callee timings if available. * setup.py and NEWS updated. * documentation updates in the profiler section: - explain the differences between the three profilers that we have now - profile and cProfile can use a unified documentation, like (c)Pickle - mention that hotshot is "for specialized usage" now - removed references to the "old profiler" that no longer exists * test updates: - extended test_profile to cover delicate cases like recursion - added tests for the caller/callee displays - added test_cProfile, performing the same tests for cProfile * TO-DO: - cProfile gives a nicer name to built-in, particularly built-in methods, which could be backported to profile. - not tested on Windows recently!
124 lines
3.2 KiB
Python
124 lines
3.2 KiB
Python
"""Test suite for the cProfile module."""
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import cProfile, pstats, sys
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# In order to have reproducible time, we simulate a timer in the global
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# variable 'ticks', which represents simulated time in milliseconds.
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# (We can't use a helper function increment the timer since it would be
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# included in the profile and would appear to consume all the time.)
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ticks = 0
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# IMPORTANT: this is an output test. *ALL* NUMBERS in the expected
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# output are relevant. If you change the formatting of pstats,
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# please don't just regenerate output/test_cProfile without checking
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# very carefully that not a single number has changed.
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def test_main():
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global ticks
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ticks = 42000
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prof = cProfile.Profile(timer, 0.001)
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prof.runctx("testfunc()", globals(), locals())
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assert ticks == 43000, ticks
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st = pstats.Stats(prof)
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st.strip_dirs().sort_stats('stdname').print_stats()
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st.print_callees()
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st.print_callers()
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def timer():
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return ticks
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def testfunc():
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# 1 call
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# 1000 ticks total: 270 ticks local, 730 ticks in subfunctions
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global ticks
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ticks += 99
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helper() # 300
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helper() # 300
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ticks += 171
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factorial(14) # 130
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def factorial(n):
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# 23 calls total
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# 170 ticks total, 150 ticks local
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# 3 primitive calls, 130, 20 and 20 ticks total
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# including 116, 17, 17 ticks local
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global ticks
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if n > 0:
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ticks += n
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return mul(n, factorial(n-1))
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else:
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ticks += 11
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return 1
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def mul(a, b):
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# 20 calls
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# 1 tick, local
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global ticks
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ticks += 1
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return a * b
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def helper():
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# 2 calls
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# 300 ticks total: 20 ticks local, 260 ticks in subfunctions
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global ticks
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ticks += 1
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helper1() # 30
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ticks += 2
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helper1() # 30
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ticks += 6
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helper2() # 50
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ticks += 3
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helper2() # 50
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ticks += 2
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helper2() # 50
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ticks += 5
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helper2_indirect() # 70
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ticks += 1
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def helper1():
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# 4 calls
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# 30 ticks total: 29 ticks local, 1 tick in subfunctions
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global ticks
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ticks += 10
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hasattr(C(), "foo") # 1
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ticks += 19
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lst = []
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lst.append(42) # 0
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sys.exc_info() # 0
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def helper2_indirect():
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helper2() # 50
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factorial(3) # 20
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def helper2():
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# 8 calls
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# 50 ticks local: 39 ticks local, 11 ticks in subfunctions
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global ticks
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ticks += 11
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hasattr(C(), "bar") # 1
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ticks += 13
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subhelper() # 10
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ticks += 15
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def subhelper():
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# 8 calls
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# 10 ticks total: 8 ticks local, 2 ticks in subfunctions
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global ticks
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ticks += 2
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for i in range(2): # 0
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try:
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C().foo # 1 x 2
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except AttributeError:
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ticks += 3 # 3 x 2
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class C:
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def __getattr__(self, name):
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# 28 calls
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# 1 tick, local
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global ticks
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ticks += 1
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raise AttributeError
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if __name__ == "__main__":
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test_main()
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