Thread: My 4K Write Program is nowhere near as fast as benchmarks

So I wrote this program that writes 100,000 4K .txt files onto disk.

HD Tune Pro says my 500 MB RAM disk gets ~90k IOPS for 4k files, ~350 MB/sec

Here is my program:

Code:

#include <iostream>
#include <fstream>
#include <cstdio>

int main() {
    char filename[100];

    for(double o = 1; o<100000; o++)
    {
        std::sprintf(filename, "%05.0lf.txt", o);
        std::ofstream ofs(filename);

        for(int i = 0; i < 77; i++)
        {
            ofs << "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
        }

        ofs << "aaaaaaaaaaaaaaa";
    }

    return 0;
}

Which gives me ~400 IOPS on the ramdisk. How can I make this go faster?

Thanks!