C＃ - 优化二进制序列化的多维数组的通用 [英] C# - Optimising binary serialization for multi-dimensional generic arrays

问题描述

我有我需要的二进制序列化的类。该类包含如下一个字段：

I have a class that I need to binary serialize. The class contains one field as below:

private T[,] m_data;

这些多维数组可以是相当大的（数十万元素）和任何基本类型。当我试图在对象上标准的.NET序列化写入到磁盘上的文件很大，我认为.NET是存储了很多元素类型的重复数据，并可能不是有效的可以做。

These multi-dimensional arrays can be fairly large (hundreds of thousands of elements) and of any primitive type. When I tried standard .net serialization on an object the file written to disk was large and I think .net is storing a lot of repeated data about element types and possibly not as efficiently as could be done.

我环顾四周的定制序列，但还没有看到任何处理多维通用阵列。我还尝试用内置.NET COM pression在与一些成功的序列化的存储流的字节数组，而不是作为快速/ COM pressed我所希望的。

I have looked around for custom serializers but have not seen any that deal with multi-dimensional generic arrays. I have also experimented with built-in .net compression on a byte array of the memory stream following serializing with some success, but not as quick / compressed as I had hoped.

我的问题是，我应该尝试编写自定义序列化优化序列化数组为适当的类型（这似乎有点令人生畏），或者我应该使用标准的.NET序列化和添加COM pression？

My question is, should I try and write a custom serializer to optimally serialize this array for the appropriate type (this seems a little daunting), or should I use standard .net serialization and add compression?

这是最好的方法任何意见将是最AP preciated，或资源链接，展示了如何解决多维数组的通用序列化 - 提到的现有的范例我发现不支持这样的结构。

Any advice on the best approach would be most appreciated, or links to resources showing how to tackle serialization of a multi-dimensional generic array - as mentioned existing examples I have found do not support such structures.

推荐答案

下面是我想出了。下面的code，使一个int [1000] [10000]，并使用BinaryFormatter的2档写入了 - 一个压缩，一个没有。

Here's what I came up with. The code below makes an int[1000][10000] and writes it out using the BinaryFormatter to 2 files - one zipped and one not.

压缩文件是1.19 MB（1255339字节） 解压后是38.2 MB（40150034字节）

The zipped file is 1.19 MB (1,255,339 bytes) Unzipped is 38.2 MB (40,150,034 bytes)

        int width = 1000;
        int height = 10000;
        List<int[]> list = new List<int[]>();
        for (int i = 0; i < height; i++)
        {
            list.Add(Enumerable.Range(0, width).ToArray());
        }
        int[][] bazillionInts = list.ToArray();
        using (FileStream fsZ = new FileStream("c:\\temp_zipped.txt", FileMode.Create))
        using (FileStream fs = new FileStream("c:\\temp_notZipped.txt", FileMode.Create))
        using (GZipStream gz = new GZipStream(fsZ, CompressionMode.Compress))
        {
            BinaryFormatter f = new BinaryFormatter();
            f.Serialize(gz, bazillionInts);
            f.Serialize(fs, bazillionInts);
        }

我想不出更好的/简单的方法来做到这一点。压缩的版本是pretty的该死的紧张。

I can't think of a better/easy way to do this. The zipped version is pretty damn tight.

我会去用的BinaryFormatter + GZipStream。制作自定义的东西不会是乐趣可言。

I'd go with the BinaryFormatter + GZipStream. Making something custom would not be fun at all.

---

[由MG编辑] 我希望你不要被编辑跌倒，但反复范围（0，宽）统一是扭曲的东西大大;变化：

[edit by MG] I hope you won't be offended by an edit, but the uniform repeated Range(0,width) is skewing things vastly; change to:

        int width = 1000;
        int height = 10000;
        Random rand = new Random(123456);
        int[,] bazillionInts = new int[width, height];
        for(int i = 0 ; i < width;i++)
            for (int j = 0; j < height; j++)
            {
                bazillionInts[i, j] = rand.Next(50000);
            }

和尝试;你会看到 temp_notZipped.txt 在40MB， temp_zipped.txt 为62MB。不那么吸引人......

And try it; you'll see temp_notZipped.txt at 40MB, temp_zipped.txt at 62MB. Not so appealing...

这篇关于C＃ - 优化二进制序列化的多维数组的通用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！