mirror of
https://github.com/python/cpython.git
synced 2025-10-31 05:31:20 +00:00
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!
123 lines
3.2 KiB
Python
123 lines
3.2 KiB
Python
"""Test suite for the profile module."""
|
|
|
|
import profile, pstats, sys
|
|
|
|
# In order to have reproducible time, we simulate a timer in the global
|
|
# variable 'ticks', which represents simulated time in milliseconds.
|
|
# (We can't use a helper function increment the timer since it would be
|
|
# included in the profile and would appear to consume all the time.)
|
|
ticks = 0
|
|
|
|
# IMPORTANT: this is an output test. *ALL* NUMBERS in the expected
|
|
# output are relevant. If you change the formatting of pstats,
|
|
# please don't just regenerate output/test_profile without checking
|
|
# very carefully that not a single number has changed.
|
|
|
|
def test_main():
|
|
global ticks
|
|
ticks = 42000
|
|
prof = profile.Profile(timer)
|
|
prof.runctx("testfunc()", globals(), locals())
|
|
assert ticks == 43000, ticks
|
|
st = pstats.Stats(prof)
|
|
st.strip_dirs().sort_stats('stdname').print_stats()
|
|
st.print_callees()
|
|
st.print_callers()
|
|
|
|
def timer():
|
|
return ticks*0.001
|
|
|
|
def testfunc():
|
|
# 1 call
|
|
# 1000 ticks total: 270 ticks local, 730 ticks in subfunctions
|
|
global ticks
|
|
ticks += 99
|
|
helper() # 300
|
|
helper() # 300
|
|
ticks += 171
|
|
factorial(14) # 130
|
|
|
|
def factorial(n):
|
|
# 23 calls total
|
|
# 170 ticks total, 150 ticks local
|
|
# 3 primitive calls, 130, 20 and 20 ticks total
|
|
# including 116, 17, 17 ticks local
|
|
global ticks
|
|
if n > 0:
|
|
ticks += n
|
|
return mul(n, factorial(n-1))
|
|
else:
|
|
ticks += 11
|
|
return 1
|
|
|
|
def mul(a, b):
|
|
# 20 calls
|
|
# 1 tick, local
|
|
global ticks
|
|
ticks += 1
|
|
return a * b
|
|
|
|
def helper():
|
|
# 2 calls
|
|
# 300 ticks total: 20 ticks local, 260 ticks in subfunctions
|
|
global ticks
|
|
ticks += 1
|
|
helper1() # 30
|
|
ticks += 2
|
|
helper1() # 30
|
|
ticks += 6
|
|
helper2() # 50
|
|
ticks += 3
|
|
helper2() # 50
|
|
ticks += 2
|
|
helper2() # 50
|
|
ticks += 5
|
|
helper2_indirect() # 70
|
|
ticks += 1
|
|
|
|
def helper1():
|
|
# 4 calls
|
|
# 30 ticks total: 29 ticks local, 1 tick in subfunctions
|
|
global ticks
|
|
ticks += 10
|
|
hasattr(C(), "foo") # 1
|
|
ticks += 19
|
|
lst = []
|
|
lst.append(42) # 0
|
|
sys.exc_info() # 0
|
|
|
|
def helper2_indirect():
|
|
helper2() # 50
|
|
factorial(3) # 20
|
|
|
|
def helper2():
|
|
# 8 calls
|
|
# 50 ticks local: 39 ticks local, 11 ticks in subfunctions
|
|
global ticks
|
|
ticks += 11
|
|
hasattr(C(), "bar") # 1
|
|
ticks += 13
|
|
subhelper() # 10
|
|
ticks += 15
|
|
|
|
def subhelper():
|
|
# 8 calls
|
|
# 10 ticks total: 8 ticks local, 2 ticks in subfunctions
|
|
global ticks
|
|
ticks += 2
|
|
for i in range(2): # 0
|
|
try:
|
|
C().foo # 1 x 2
|
|
except AttributeError:
|
|
ticks += 3 # 3 x 2
|
|
|
|
class C:
|
|
def __getattr__(self, name):
|
|
# 28 calls
|
|
# 1 tick, local
|
|
global ticks
|
|
ticks += 1
|
|
raise AttributeError
|
|
|
|
if __name__ == "__main__":
|
|
test_main()
|