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#! /usr/bin/python3.6 """ "PYSTONE" Benchmark Program Version: Python/1.2 (corresponds to C/1.1 plus 3 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. Version 1.2 changes the division to floor division. Under Python 3 version 1.1 would use the normal division operator, resulting in some of the operations mistakenly yielding floats. Version 1.2 instead uses floor division making the benchmark an integer benchmark again. """ LOOPS = 50000 from time import time __version__ = "1.2" [Ident1, Ident2, Ident3, Ident4, Ident5] = range(1, 6) class Record: 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 = time() for i in range(loops): pass nulltime = time() - 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 = time() 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 = time() - 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)