Fastest way to write large STL vector to file using STL

Question

I have a large vector (10^9 elements) of chars, and I was wondering what is the fastest way to write such vector to a file. So far I\'ve been using next code:

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Answer 1

With such a large amount of data to be written (~1GB), you should write to the output stream directly, rather than using an output iterator. Since the data in a vector is stored contiguously, this will work and should be much faster.

ofstream outfile("nanocube.txt", ios::out | ios::binary);
outfile.write(&vs[0], vs.size());