I m 编写双元数据格式,以存档,其中载有序列物体图表。 为了更能抵御错误(并能够解答问题),我正在考虑在上游确定每个目标。 目前使用C#和BaryWriter的Im,但这是一个普遍的问题。
The size of each object isn t known until it has been completely serialized, so to be able to write the length prefixes there are a number of strategies:
在标的编号之后,使用具有足够空间的书写缓冲器,随机进入,并在正确位置上加长。
每一物体都写给自己的记忆,然后将缓冲和缓冲内容的长度写到主流。
第1份通行证中的所有物体的注销时间为零,记住所有物体尺寸的档案中的位置(物体大小表),并作第二次填满所有尺寸的通行证。
?
总面积(因而是第一/最主要物体的大小)通常在1mb左右,但可高达50-100mb。 我关切的是这一进程的表现和记忆使用。
哪些战略最有效率?
哪些战略最有效率?
确定这一点的唯一途径是衡量。
我的第一个本能是使用第2号,但知道这可能会给GC带来压力(或者如果工人的溪流超过80Kb,那么大物体的碎裂)。 但是,考虑到跟踪这些职位的复杂性,第3号是可维持的。
最后,你需要用你的数据来衡量,并且认为,除非你有特殊情况,否则业绩将主要依靠网络或储存业绩,而不是通过记忆处理。
100MB在小型服务器(或标准台式电脑)的记忆中仅占2.5%。 I d 序列ize to memory (e.g. a byte[] protocol/MemoryStream with BinaryWriter) and subsequently flush that tomoto when do.
这还将使你的代码保持干净、紧凑和易于管理——使你避免一分钟的失灵,并在大博里找回。
希望这一帮助!
如果你控制这种格式,你可以积累一份标尺清单,并在你档案结束时附上目录。 然而,不要忘记这一点。 NET 世界你书写的缓冲器在实际转移到磁带之前多次复印。 因此,通过避免(say)附加
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