序列化数据太大了

Question

我为每个播放器服务器端序列化数据,它的大小约为128kb.我序列化一个[255,255] bool数组,这是映射必须的,我可以使用哪些替代品,因为我听说gzip实际上会增加大小？

我听说过protobuf-net,但它没有记录,互联网上也没有例子.

Answer 1

我要做的第一件事就是:不要将数据存储在bool[,]- 这是非常低效的,并且存储真正的痛苦.我会写一个把它变成扁平的包装纸byte[]:

public sealed class BitGrid
{
    public BitGrid() {
        // 255 * 255 = 32 bytes per row, 255 rows
        bytes = new byte[8160];
    }
    public BitGrid(byte[] data)
    {
        if (data == null) throw new ArgumentNullException("data");
        if (data.Length != 8160) throw new ArgumentException("data");
        this.bytes = data;
    }

    readonly byte[] bytes;

    public bool this[byte x, byte y]
    {
        get
        {
            int xByte = x / 8, xBit = x % 8;
            byte val = bytes[(32 * y) + xByte];
            switch (xBit)
            {
                case 0: return (val & 1) != 0;
                case 1: return (val & 2) != 0;
                case 2: return (val & 4) != 0;
                case 3: return (val & 8) != 0;
                case 4: return (val & 16) != 0;
                case 5: return (val & 32) != 0;
                case 6: return (val & 64) != 0;
                case 7: return (val & 128) != 0;
            }
            throw new InvalidOperationException("oops!");
        }
        set
        {
            int xByte = x / 8, xBit = x % 8;
            int offset = (32 * y) + xByte;
            byte val = bytes[offset];
            if (value)
            {
                switch (xBit)
                {
                    case 0: val |= 1; break;
                    case 1: val |= 2; break;
                    case 2: val |= 4; break;
                    case 3: val |= 8; break;
                    case 4: val |= 16; break;
                    case 5: val |= 32; break;
                    case 6: val |= 64; break;
                    case 7: val |= 128; break;
                }
            }
            else
            {
                switch (xBit)
                {
                    case 0: val &= 254; break;
                    case 1: val &= 253; break;
                    case 2: val &= 251; break;
                    case 3: val &= 247; break;
                    case 4: val &= 239; break;
                    case 5: val &= 223; break;
                    case 6: val &= 191; break;
                    case 7: val &= 127; break;
                }
            }

            bytes[offset] = val;
        }
    }
    public byte[] ToArray()
    {
        return (byte[])bytes.Clone();
    }
}

然后序列化它,它只是:

byte[] data = grid.ToArray();
// store "data"

并且反序列化,它只是:

byte[] data = ...
grid = new BitGrid(data);

您可以byte[]使用File.ReadAllBytes/ File.WriteAllBytes方法保存/加载磁盘,或者如果您要存储其他数据,那么任何标准的序列化程序都可以正常使用byte[].这个数据总是8160字节 - 不到8k.