`
cywhoyi
  • 浏览: 420134 次
  • 性别: Icon_minigender_1
  • 来自: 杭州
社区版块
存档分类
最新评论

File Serialization的加速度

阅读更多

File读写是我们经常对于File处理经常需要动作,接下来我会用4中方式进行操作,具体在项目中采用哪一种方式,由自己进行判断。

最近在Thomas Nagel《What Does It All Mean》,摘录开头一段话:

要评估每一种主张,每一条论证和每一套理论,并且尝试着判断它们是否可以被接受,这最终都依赖于每一个人的独立思考,而非听命于权威

2B青年方式:

  private static class StandardSerialization implements SerializationTest {
    public void testWriteBuffered(TestObject test, String fileName) throws IOException {
      ObjectOutputStream objectOutputStream = null;
      try {
        FileOutputStream fileOutputStream = new FileOutputStream(fileName);
        BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(fileOutputStream);
        objectOutputStream = new ObjectOutputStream(bufferedOutputStream);
        objectOutputStream.writeObject(test);
      } finally {
        if (objectOutputStream != null) {
          objectOutputStream.close();
        }
      }
    }

    public TestObject testReadBuffered(String fileName) throws IOException, ClassNotFoundException {
      ObjectInputStream objectInputStream = null;
      try {
        FileInputStream fileInputStream = new FileInputStream(fileName);
        BufferedInputStream bufferedInputStream = new BufferedInputStream(fileInputStream);
        objectInputStream = new ObjectInputStream(bufferedInputStream);
        return (TestObject) objectInputStream.readObject();
      } finally {
        if (objectInputStream != null) {
          objectInputStream.close();
        }
      }
    }
  }

 普通青年:

private static class StandardSerializationRaf implements SerializationTest {
    public void testWriteBuffered(TestObject test, String fileName) throws IOException {
      ObjectOutputStream objectOutputStream = null;
      try {
        RandomAccessFile randomAccessFile = new RandomAccessFile(fileName, FILE_MODE_RW);
        FileOutputStream fileOutputStream = new FileOutputStream(randomAccessFile.getFD());
        objectOutputStream = new ObjectOutputStream(fileOutputStream);
        objectOutputStream.writeObject(test);
      } finally {
        if (objectOutputStream != null) {
          objectOutputStream.close();
        }
      }
    }

    public TestObject testReadBuffered(String fileName) throws IOException, ClassNotFoundException {
      ObjectInputStream objectInputStream = null;
      try {
        RandomAccessFile randomAccessFile = new RandomAccessFile(fileName, FILE_MODE_R);
        FileInputStream fileInputStream = new FileInputStream(randomAccessFile.getFD());
        objectInputStream = new ObjectInputStream(fileInputStream);
        return (TestObject) objectInputStream.readObject();
      } finally {
        if (objectInputStream != null) {
          objectInputStream.close();
        }
      }
    }
  }

 文艺青年:

采用Kryo Framework

  private static class Kryo2Serialization implements SerializationTest {

    private static Kryo kryo = new Kryo();

    public void testWriteBuffered(TestObject test, String fileName) throws IOException {
      Output output = null;
      try {
        RandomAccessFile raf = new RandomAccessFile(fileName, "rw");
        output = new Output(new FileOutputStream(raf.getFD()), MAX_BUFFER_SIZE);
        kryo.writeObject(output, test);
      } finally {
        if (output != null) {
          output.close();
        }
      }
    }

    public TestObject testReadBuffered(String fileName) throws IOException {
      Input input = null;
      try {
        RandomAccessFile raf = new RandomAccessFile(fileName, "r");
        input = new Input(new FileInputStream(raf.getFD()), MAX_BUFFER_SIZE);
        return kryo.readObject(input, TestObject.class);
      } finally {
        if (input != null) {
          input.close();
        }
      }

    }
  }

 Geeker:

  private static class DirectSerialization implements SerializationTest {
    public void testWriteBuffered(TestObject test, String fileName) throws IOException {
      RandomAccessFile raf = null;
      try {
        MemoryBuffer memoryBuffer = new MemoryBuffer(MAX_BUFFER_SIZE);
        raf = new RandomAccessFile(fileName, FILE_MODE_RW);
        test.write(memoryBuffer);
        raf.write(memoryBuffer.getBuffer());
      } finally {
        if (raf != null) {
          raf.close();
        }
      }
    }

    public TestObject testReadBuffered(String fileName) throws IOException {
      RandomAccessFile raf = null;
      try {
        raf = new RandomAccessFile(fileName, FILE_MODE_R);
        MemoryBuffer unsafeBuffer = new MemoryBuffer((int) raf.length());
        raf.read(unsafeBuffer.getBuffer());
        return TestObject.read(unsafeBuffer);
      } finally {
        if (raf != null) {
          raf.close();
        }
      }
    }
  }

 最终输出的结果是:



 结论:

RandomAccessFile确实提高很明显

Kryo-dynamic serialization在write的时候优势明显,读取相差无几

UNSAFE_MEMORY确实高效,不过容易Memory Leak

  • 大小: 68.9 KB
分享到:
评论
1 楼 li15038043160_ 2013-11-04  
Java的序列化现在有些过时了,用json保存数据简洁高效无污染!

相关推荐

    System.Runtime.Serialization.DLL.zip

    《深入理解System.Runtime.Serialization.DLL及其在.NET框架中的作用》 在.NET框架中,`System.Runtime.Serialization`命名空间是处理序列化和反序列化的核心组件,而`System.Runtime.Serialization.dll`则是这个...

    sirenix.serialization.dll

    sirenix.serialization.dll

    System.Runtime.Serialization.dll

    放在bin文件夹 解决 System.Runtime.Serialization.Json无法引用的问题

    hystrix-serialization-1.5.18.jar

    hystrix-serialization-1.5.18.jar

    kotlinx-serialization-compiler-plugin.jar

    kotlinx-serialization-compiler-plugin.jar

    PyPI 官网下载 | oslo.serialization-2.2.0.tar.gz

    **PyPI 官网下载 | oslo.serialization-2.2.0.tar.gz** PyPI(Python Package Index)是Python开发者获取和分享开源软件包的主要平台。`oslo.serialization` 是一个在PyPI上发布的Python库,它专注于数据序列化和反...

    Boost::Serialization存储C++对象

    文本存档便于人类阅读,而二进制存档则更紧凑且速度更快。存档对象负责实际的序列化和反序列化操作。 4. **序列化策略**:可以使用`BOOST_CLASS_EXPORT`宏来标记类,以便在运行时动态注册,也可以在编译时静态注册...

    kotlinx.serialization,Kotlin跨平台/多格式序列化.zip

    【Kotlinx.Serialization详解】 Kotlinx.Serialization是一个强大的开源库,专门为Kotlin编程语言提供了跨平台的序列化解决方案。这个库允许开发者将数据对象转换成字节流或JSON等不同格式,反之亦然,这对于数据...

    C++11 下使用 Boost.Serialization 库实现智能指针的序列化

    Boost.Serialization库是C++社区广泛使用的序列化工具,它提供了丰富的功能来处理各种类型的对象,包括智能指针。在C++11及更高版本中,智能指针(如`std::unique_ptr`,`std::shared_ptr`和`std::scoped_ptr`)被...

    System.Web.Script.Serialization.7z

    .net2.0版本的json操作类 ...System.Web.Script.Serialization的json操作类,位于3.0以上的System.Web.Extensions类库中. 本项目是从System.Web.Extensions中剥离出System.Web.Script.Serialization的完整项目

    序列化和反序列化 Serialization

    数据的序列化和反序列化 Serialization DeSerialization

    akka-kryo-serialization, 基于Kryo的Akka序列化.zip

    akka-kryo-serialization, 基于Kryo的Akka序列化 akka-kryo-serialization-- Scala 和Akka基于kryo的序列化程序这个库为 Scala 和Akka提供定制的基于kryo的序列化程序。 它可以用于更高效的akka远程处理。它还可以...

    JsonSerialization.hpp

    - 整个代码由一个头文件组成 json.hpp,没有子项目,没有依赖关系,没有复杂的构建系统,使用起来非常方便 - 语法直观,就像写普通的c++代码 - 不止用起来似c++习惯和风格,更是使用 C++ 11 标准编写 ...

    Android代码-kotlinx.serialization

    Kotlin cross-platform / multi-format reflectionless serialization Kotlin serialization consists of a compiler plugin, which automatically produces visitor code for classes, and runtime library, ...

    Fast-serialization 也叫FST ava快速对象序列化的开发包

    根据测试结果,fast-serialization的序列化速度可以提高2到10倍。此外,fast-serialization与JDK原生的序列化是兼容的,因此可以作为JDK原生序列化的drop-in replacement使用。这就意味着,开发者可以在不需要修改已...

    Python库 | oslo.serialization-2.21.0-py2.py3-none-any.whl

    资源分类:Python库 所属语言:Python 资源全名:oslo.serialization-2.21.0-py2.py3-none-any.whl 资源来源:官方 安装方法:https://lanzao.blog.csdn.net/article/details/101784059

    A C++11 library for serialization

    cereal is a header-only C++11 serialization library. cereal takes arbitrary data types and reversibly turns them into different representations, such as compact binary encodings, XML, or JSON. cereal ...

    System.Runtime.Serialization.dll / ServiceModel.dll/ServiceModel.Web.dll

    在.NET框架中,`System.Runtime.Serialization.dll`, `ServiceModel.dll` 和 `ServiceModel.Web.dll` 这三个动态链接库(DLL)是实现数据序列化和网络服务操作的关键组件。它们在开发过程中扮演着重要角色,特别是在...

Global site tag (gtag.js) - Google Analytics