如何快速加载更大尺寸(1GB)的文件? [英] How to load files of greater sizes (1GB) quickly?

问题描述

大家好，

我正在编写一个查看器MFC应用程序，它将解析输入文件(bin文件)并显示其内容.我已经使用mysql来存储和检索记录.当我使用小文件(1 MB)处理大文件(> 100MB)时，可以加载太多时间.你们能给我一些想法，以便我快速读取和加载文件可能不到一分钟.

谢谢，

Hi All,

I am writing a viewer MFC application, which will parse the input file (a bin file) and display its contents. I have used mysql to store and retrieve records. Its ok when i am working with small file (1 MB) for big files (>100MB) it is taking too much time to load. Can you guys give me some ideas so that I can read and load the files quickly may be less than a minute.

Thanks,

推荐答案

是否尝试过完全不加载，而是使用CMemMapFile [ ^ ]代替?因为它使用OS分页机制，所以它的速度最快.

Have you tried not loading it at all, but using a CMemMapFile[^] instead? That''s about as fast as it can get since it uses the OS paging mechanism.

诀窍是仅加载所需的部分.例如，用户一次只能看到整个文件内容的一小部分，您应该利用这一事实仅加载所需的数据部分.

The trick is loading only the needed part. For instance, the user can just see a small part of the whole file content at time, you should exploit this fact to load only the required portion of data.

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