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pystone.py
#!/usr/bin/env python3 """ "PYSTONE" Benchmark Program Version: Python/1.1 (corresponds to C/1.1 plus 2 Pystone fixes) Author: Reinhold P. Weicker, CACM Vol 27, No 10, 10/84 pg. 1013. Translated from ADA to C by Rick Richardson. Every method to preserve ADA-likeness has been used, at the expense of C-ness. Translated from C to Python by Guido van Rossum. Version History: Version 1.1 corrects two bugs in version 1.0: First, it leaked memory: in Proc1(), NextRecord ends up having a pointer to itself. I have corrected this by zapping NextRecord.PtrComp at the end of Proc1(). Second, Proc3() used the operator != to compare a record to None. This is rather inefficient and not true to the intention of the original benchmark (where a pointer comparison to None is intended; the != operator attempts to find a method __cmp__ to do value comparison of the record). Version 1.1 runs 5-10 percent faster than version 1.0, so benchmark figures of different versions can't be compared directly. """ from __future__ import print_function from time import clock LOOPS = 50000 __version__ = "1.1" [Ident1, Ident2, Ident3, Ident4, Ident5] = range(1, 6) class Record(object): def __init__(self, PtrComp = None, Discr = 0, EnumComp = 0, IntComp = 0, StringComp = 0): self.PtrComp = PtrComp self.Discr = Discr self.EnumComp = EnumComp self.IntComp = IntComp self.StringComp = StringComp def copy(self): return Record(self.PtrComp, self.Discr, self.EnumComp, self.IntComp, self.StringComp) TRUE = 1 FALSE = 0 def main(loops=LOOPS): benchtime, stones = pystones(loops) print("Pystone(%s) time for %d passes = %g" % \ (__version__, loops, benchtime)) print("This machine benchmarks at %g pystones/second" % stones) def pystones(loops=LOOPS): return Proc0(loops) IntGlob = 0 BoolGlob = FALSE Char1Glob = '\0' Char2Glob = '\0' Array1Glob = [0]*51 Array2Glob = [x[:] for x in [Array1Glob]*51] PtrGlb = None PtrGlbNext = None def Proc0(loops=LOOPS): global IntGlob global BoolGlob global Char1Glob global Char2Glob global Array1Glob global Array2Glob global PtrGlb global PtrGlbNext starttime = clock() for i in range(loops): pass nulltime = clock() - starttime PtrGlbNext = Record() PtrGlb = Record() PtrGlb.PtrComp = PtrGlbNext PtrGlb.Discr = Ident1 PtrGlb.EnumComp = Ident3 PtrGlb.IntComp = 40 PtrGlb.StringComp = "DHRYSTONE PROGRAM, SOME STRING" String1Loc = "DHRYSTONE PROGRAM, 1'ST STRING" Array2Glob[8][7] = 10 starttime = clock() for i in range(loops): Proc5() Proc4() IntLoc1 = 2 IntLoc2 = 3 String2Loc = "DHRYSTONE PROGRAM, 2'ND STRING" EnumLoc = Ident2 BoolGlob = not Func2(String1Loc, String2Loc) while IntLoc1 < IntLoc2: IntLoc3 = 5 * IntLoc1 - IntLoc2 IntLoc3 = Proc7(IntLoc1, IntLoc2) IntLoc1 = IntLoc1 + 1 Proc8(Array1Glob, Array2Glob, IntLoc1, IntLoc3) PtrGlb = Proc1(PtrGlb) CharIndex = 'A' while CharIndex <= Char2Glob: if EnumLoc == Func1(CharIndex, 'C'): EnumLoc = Proc6(Ident1) CharIndex = chr(ord(CharIndex)+1) IntLoc3 = IntLoc2 * IntLoc1 IntLoc2 = IntLoc3 / IntLoc1 IntLoc2 = 7 * (IntLoc3 - IntLoc2) - IntLoc1 IntLoc1 = Proc2(IntLoc1) benchtime = clock() - starttime - nulltime if benchtime == 0.0: loopsPerBenchtime = 0.0 else: loopsPerBenchtime = (loops / benchtime) return benchtime, loopsPerBenchtime def Proc1(PtrParIn): PtrParIn.PtrComp = NextRecord = PtrGlb.copy() PtrParIn.IntComp = 5 NextRecord.IntComp = PtrParIn.IntComp NextRecord.PtrComp = PtrParIn.PtrComp NextRecord.PtrComp = Proc3(NextRecord.PtrComp) if NextRecord.Discr == Ident1: NextRecord.IntComp = 6 NextRecord.EnumComp = Proc6(PtrParIn.EnumComp) NextRecord.PtrComp = PtrGlb.PtrComp NextRecord.IntComp = Proc7(NextRecord.IntComp, 10) else: PtrParIn = NextRecord.copy() NextRecord.PtrComp = None return PtrParIn def Proc2(IntParIO): IntLoc = IntParIO + 10 while 1: if Char1Glob == 'A': IntLoc = IntLoc - 1 IntParIO = IntLoc - IntGlob EnumLoc = Ident1 if EnumLoc == Ident1: break return IntParIO def Proc3(PtrParOut): global IntGlob if PtrGlb is not None: PtrParOut = PtrGlb.PtrComp else: IntGlob = 100 PtrGlb.IntComp = Proc7(10, IntGlob) return PtrParOut def Proc4(): global Char2Glob BoolLoc = Char1Glob == 'A' BoolLoc = BoolLoc or BoolGlob Char2Glob = 'B' def Proc5(): global Char1Glob global BoolGlob Char1Glob = 'A' BoolGlob = FALSE def Proc6(EnumParIn): EnumParOut = EnumParIn if not Func3(EnumParIn): EnumParOut = Ident4 if EnumParIn == Ident1: EnumParOut = Ident1 elif EnumParIn == Ident2: if IntGlob > 100: EnumParOut = Ident1 else: EnumParOut = Ident4 elif EnumParIn == Ident3: EnumParOut = Ident2 elif EnumParIn == Ident4: pass elif EnumParIn == Ident5: EnumParOut = Ident3 return EnumParOut def Proc7(IntParI1, IntParI2): IntLoc = IntParI1 + 2 IntParOut = IntParI2 + IntLoc return IntParOut def Proc8(Array1Par, Array2Par, IntParI1, IntParI2): global IntGlob IntLoc = IntParI1 + 5 Array1Par[IntLoc] = IntParI2 Array1Par[IntLoc+1] = Array1Par[IntLoc] Array1Par[IntLoc+30] = IntLoc for IntIndex in range(IntLoc, IntLoc+2): Array2Par[IntLoc][IntIndex] = IntLoc Array2Par[IntLoc][IntLoc-1] = Array2Par[IntLoc][IntLoc-1] + 1 Array2Par[IntLoc+20][IntLoc] = Array1Par[IntLoc] IntGlob = 5 def Func1(CharPar1, CharPar2): CharLoc1 = CharPar1 CharLoc2 = CharLoc1 if CharLoc2 != CharPar2: return Ident1 else: return Ident2 def Func2(StrParI1, StrParI2): IntLoc = 1 while IntLoc <= 1: if Func1(StrParI1[IntLoc], StrParI2[IntLoc+1]) == Ident1: CharLoc = 'A' IntLoc = IntLoc + 1 if CharLoc >= 'W' and CharLoc <= 'Z': IntLoc = 7 if CharLoc == 'X': return TRUE else: if StrParI1 > StrParI2: IntLoc = IntLoc + 7 return TRUE else: return FALSE def Func3(EnumParIn): EnumLoc = EnumParIn if EnumLoc == Ident3: return TRUE return FALSE if __name__ == '__main__': import sys def error(msg): print(msg, end=' ', file=sys.stderr) print("usage: %s [number_of_loops]" % sys.argv[0], file=sys.stderr) sys.exit(100) nargs = len(sys.argv) - 1 if nargs > 1: error("%d arguments are too many;" % nargs) elif nargs == 1: try: loops = int(sys.argv[1]) except ValueError: error("Invalid argument %r;" % sys.argv[1]) else: loops = LOOPS main(loops)
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