全方位测试 Python、Java运行速度比较(2)

NativeTest

Python

Java

from pynative import *

for i in xrange(1000000):

    hello()

public class NativeTest

{

    public native void nativeMethod();

    static {

        System.loadLibrary("javanative");

    }

    public static void main(String[] args) {

        NativeTest nt = new NativeTest();

        for (int i = 0; i < 1000000; i++)

        {

            nt.nativeMethod();

        }

    }

}

Python C Module

Java C Module

#include "Python.h"

static PyObject*

pynative_hello(self,args)

     PyObject *self;

     PyObject *args;

{

  printf("Hello, world!\n");

  Py_INCREF(Py_None);

  return Py_None;

}

static PyMethodDef NativeMethods[] = {

  {"hello", pynative_hello, METH_VARARGS},

  {NULL, NULL}, /* Sentinel... what's this? */

};

void

initpynative()

{

  (void) Py_InitModule("pynative", NativeMethods);

}

--- Autogenerated NativeTest.h ---

/* DO NOT EDIT THIS FILE - it is machine generated */

#include

/* Header for class NativeTest */

#ifndef _Included_NativeTest

#define _Included_NativeTest

#pragma pack(4)

typedef struct ClassNativeTest {

    char PAD;

/* ANSI C requires structures to have a least one member */

} ClassNativeTest;

HandleTo(NativeTest);

#pragma pack()

#ifdef __cplusplus

extern "C" {

#endif

extern void NativeTest_nativeMethod(struct HNativeTest *);

#ifdef __cplusplus

}

#endif

#endif

---

#include

#include

#include "NativeTest.h"

JNIEXPORT void JNICALL

Java_NativeTest_nativeMethod(JNIEnv *env, jobject obj)

{

  printf("Hello world!\n");

}

NoTest

Python

Java

public class NoTest { public static void main(String[] args){} }

ObjectTest

Python

Java

class ObjectTest: pass

for i in xrange(1000):

    root=ObjectTest()

    for j in xrange(10000):

        root.next=ObjectTest()

        root=root.next

public class ObjectTest {

    public ObjectTest next;

    public static void main(String[] args) {

        for (int i = 0; i < 1000; i++) {

            ObjectTest root = new ObjectTest();

            for (int j = 0; j < 10000; j++) {

                root.next=new ObjectTest();

                root=root.next;

            }

        }

    }

}

SpeedTest

Python

Java

for x in xrange(1000000):

    pass

public class SpeedTest {

    public static void main(String[] args) {

        for (int i = 0; i < 1000000; i++);

    }

}