mirror of https://github.com/python/cpython
Remove pystone microbenchmark
Issue #15369. Please use the new "performance" benchmark suite.
This commit is contained in:
Victor Stinner
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13b97e37d9
commit
61fd70e050
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#! /usr/bin/env python3
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"""
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"PYSTONE" Benchmark Program
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Version: Python/1.2 (corresponds to C/1.1 plus 3 Pystone fixes)
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Author: Reinhold P. Weicker, CACM Vol 27, No 10, 10/84 pg. 1013.
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Translated from ADA to C by Rick Richardson.
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Every method to preserve ADA-likeness has been used,
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at the expense of C-ness.
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Translated from C to Python by Guido van Rossum.
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Version History:
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Version 1.1 corrects two bugs in version 1.0:
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First, it leaked memory: in Proc1(), NextRecord ends
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up having a pointer to itself. I have corrected this
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by zapping NextRecord.PtrComp at the end of Proc1().
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Second, Proc3() used the operator != to compare a
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record to None. This is rather inefficient and not
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true to the intention of the original benchmark (where
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a pointer comparison to None is intended; the !=
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operator attempts to find a method __cmp__ to do value
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comparison of the record). Version 1.1 runs 5-10
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percent faster than version 1.0, so benchmark figures
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of different versions can't be compared directly.
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Version 1.2 changes the division to floor division.
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Under Python 3 version 1.1 would use the normal division
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operator, resulting in some of the operations mistakenly
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yielding floats. Version 1.2 instead uses floor division
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making the benchmark an integer benchmark again.
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"""
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LOOPS = 50000
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from time import time
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__version__ = "1.2"
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[Ident1, Ident2, Ident3, Ident4, Ident5] = range(1, 6)
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class Record:
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def __init__(self, PtrComp = None, Discr = 0, EnumComp = 0,
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IntComp = 0, StringComp = 0):
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self.PtrComp = PtrComp
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self.Discr = Discr
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self.EnumComp = EnumComp
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self.IntComp = IntComp
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self.StringComp = StringComp
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def copy(self):
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return Record(self.PtrComp, self.Discr, self.EnumComp,
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self.IntComp, self.StringComp)
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TRUE = 1
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FALSE = 0
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def main(loops=LOOPS):
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benchtime, stones = pystones(loops)
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print("Pystone(%s) time for %d passes = %g" % \
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(__version__, loops, benchtime))
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print("This machine benchmarks at %g pystones/second" % stones)
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def pystones(loops=LOOPS):
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return Proc0(loops)
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IntGlob = 0
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BoolGlob = FALSE
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Char1Glob = '\0'
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Char2Glob = '\0'
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Array1Glob = [0]*51
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Array2Glob = [x[:] for x in [Array1Glob]*51]
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PtrGlb = None
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PtrGlbNext = None
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def Proc0(loops=LOOPS):
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global IntGlob
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global BoolGlob
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global Char1Glob
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global Char2Glob
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global Array1Glob
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global Array2Glob
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global PtrGlb
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global PtrGlbNext
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starttime = time()
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for i in range(loops):
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pass
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nulltime = time() - starttime
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PtrGlbNext = Record()
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PtrGlb = Record()
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PtrGlb.PtrComp = PtrGlbNext
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PtrGlb.Discr = Ident1
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PtrGlb.EnumComp = Ident3
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PtrGlb.IntComp = 40
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PtrGlb.StringComp = "DHRYSTONE PROGRAM, SOME STRING"
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String1Loc = "DHRYSTONE PROGRAM, 1'ST STRING"
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Array2Glob[8][7] = 10
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starttime = time()
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for i in range(loops):
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Proc5()
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Proc4()
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IntLoc1 = 2
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IntLoc2 = 3
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String2Loc = "DHRYSTONE PROGRAM, 2'ND STRING"
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EnumLoc = Ident2
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BoolGlob = not Func2(String1Loc, String2Loc)
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while IntLoc1 < IntLoc2:
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IntLoc3 = 5 * IntLoc1 - IntLoc2
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IntLoc3 = Proc7(IntLoc1, IntLoc2)
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IntLoc1 = IntLoc1 + 1
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Proc8(Array1Glob, Array2Glob, IntLoc1, IntLoc3)
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PtrGlb = Proc1(PtrGlb)
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CharIndex = 'A'
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while CharIndex <= Char2Glob:
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if EnumLoc == Func1(CharIndex, 'C'):
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EnumLoc = Proc6(Ident1)
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CharIndex = chr(ord(CharIndex)+1)
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IntLoc3 = IntLoc2 * IntLoc1
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IntLoc2 = IntLoc3 // IntLoc1
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IntLoc2 = 7 * (IntLoc3 - IntLoc2) - IntLoc1
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IntLoc1 = Proc2(IntLoc1)
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benchtime = time() - starttime - nulltime
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if benchtime == 0.0:
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loopsPerBenchtime = 0.0
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else:
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loopsPerBenchtime = (loops / benchtime)
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return benchtime, loopsPerBenchtime
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def Proc1(PtrParIn):
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PtrParIn.PtrComp = NextRecord = PtrGlb.copy()
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PtrParIn.IntComp = 5
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NextRecord.IntComp = PtrParIn.IntComp
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NextRecord.PtrComp = PtrParIn.PtrComp
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NextRecord.PtrComp = Proc3(NextRecord.PtrComp)
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if NextRecord.Discr == Ident1:
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NextRecord.IntComp = 6
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NextRecord.EnumComp = Proc6(PtrParIn.EnumComp)
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NextRecord.PtrComp = PtrGlb.PtrComp
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NextRecord.IntComp = Proc7(NextRecord.IntComp, 10)
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else:
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PtrParIn = NextRecord.copy()
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NextRecord.PtrComp = None
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return PtrParIn
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def Proc2(IntParIO):
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IntLoc = IntParIO + 10
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while 1:
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if Char1Glob == 'A':
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IntLoc = IntLoc - 1
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IntParIO = IntLoc - IntGlob
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EnumLoc = Ident1
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if EnumLoc == Ident1:
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break
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return IntParIO
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def Proc3(PtrParOut):
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global IntGlob
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if PtrGlb is not None:
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PtrParOut = PtrGlb.PtrComp
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else:
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IntGlob = 100
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PtrGlb.IntComp = Proc7(10, IntGlob)
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return PtrParOut
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def Proc4():
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global Char2Glob
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BoolLoc = Char1Glob == 'A'
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BoolLoc = BoolLoc or BoolGlob
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Char2Glob = 'B'
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def Proc5():
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global Char1Glob
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global BoolGlob
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Char1Glob = 'A'
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BoolGlob = FALSE
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def Proc6(EnumParIn):
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EnumParOut = EnumParIn
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if not Func3(EnumParIn):
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EnumParOut = Ident4
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if EnumParIn == Ident1:
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EnumParOut = Ident1
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elif EnumParIn == Ident2:
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if IntGlob > 100:
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EnumParOut = Ident1
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else:
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EnumParOut = Ident4
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elif EnumParIn == Ident3:
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EnumParOut = Ident2
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elif EnumParIn == Ident4:
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pass
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elif EnumParIn == Ident5:
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EnumParOut = Ident3
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return EnumParOut
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def Proc7(IntParI1, IntParI2):
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IntLoc = IntParI1 + 2
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IntParOut = IntParI2 + IntLoc
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return IntParOut
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def Proc8(Array1Par, Array2Par, IntParI1, IntParI2):
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global IntGlob
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IntLoc = IntParI1 + 5
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Array1Par[IntLoc] = IntParI2
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Array1Par[IntLoc+1] = Array1Par[IntLoc]
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Array1Par[IntLoc+30] = IntLoc
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for IntIndex in range(IntLoc, IntLoc+2):
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Array2Par[IntLoc][IntIndex] = IntLoc
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Array2Par[IntLoc][IntLoc-1] = Array2Par[IntLoc][IntLoc-1] + 1
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Array2Par[IntLoc+20][IntLoc] = Array1Par[IntLoc]
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IntGlob = 5
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def Func1(CharPar1, CharPar2):
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CharLoc1 = CharPar1
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CharLoc2 = CharLoc1
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if CharLoc2 != CharPar2:
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return Ident1
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else:
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return Ident2
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def Func2(StrParI1, StrParI2):
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IntLoc = 1
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while IntLoc <= 1:
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if Func1(StrParI1[IntLoc], StrParI2[IntLoc+1]) == Ident1:
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CharLoc = 'A'
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IntLoc = IntLoc + 1
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if CharLoc >= 'W' and CharLoc <= 'Z':
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IntLoc = 7
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if CharLoc == 'X':
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return TRUE
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else:
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if StrParI1 > StrParI2:
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IntLoc = IntLoc + 7
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return TRUE
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else:
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return FALSE
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def Func3(EnumParIn):
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EnumLoc = EnumParIn
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if EnumLoc == Ident3: return TRUE
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return FALSE
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if __name__ == '__main__':
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import sys
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def error(msg):
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print(msg, end=' ', file=sys.stderr)
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print("usage: %s [number_of_loops]" % sys.argv[0], file=sys.stderr)
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sys.exit(100)
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nargs = len(sys.argv) - 1
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if nargs > 1:
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error("%d arguments are too many;" % nargs)
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elif nargs == 1:
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try: loops = int(sys.argv[1])
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except ValueError:
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error("Invalid argument %r;" % sys.argv[1])
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else:
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loops = LOOPS
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main(loops)
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@ -16,10 +16,10 @@ Library
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Tools/Demos
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-----------
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- Issue #15369: The pybench microbenchmark has been removed from Tools. Please
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use the new Python benchmark suite https://github.com/python/performance
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which is more reliable and includes a portable version of pybench working on
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Python 2 and Python 3.
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- Issue #15369: The pybench and pystone microbenchmark have been removed from
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Tools. Please use the new Python benchmark suite
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https://github.com/python/performance which is more reliable and includes a
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portable version of pybench working on Python 2 and Python 3.
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- Issue #28102: The zipfile module CLI now prints usage to stderr.
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Patch by Stephen J. Turnbull.
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