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c++windowsfilememory

fastest technique to read a file into memory?

Is there a generally-accepted fastest technique which is used to read a file into memory in c++?

I will only be reading the file.

I have seen boost have an implementation and I have seen a couple other implementations on here but I would like to know what is considered the fastest?

Thank you in advance

In case it matters, I am considering files up to 1GB and this is for windows.

Solution

  • Use memory-mapped files, maybe using the boost wrapper for portability.

    If you want to read files bigger than the free, contiguous portion of your virtual address space, you can move the mapped portion of the file at will.