C++ fstream writing to file very slow -

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i have 2d world in game consisting of tiles. whenever make new world initialize array of 48 million tiles

short worldgrid[48000000];

i set value 48 million, write values file this:

    std::fstream save("game_save", std::fstream::out);      (int x = 0; x < 48000000; x++)     {          save << world.worldgrid[x];         save << " ";      }     save.close();

it's 48 million values, each 1 2 bytes. 96 million bytes, or 96 megabtyes. problem process inside loop alone takes 2 minutes complete on ssd. don't feel should take 2 minutes , 5 seconds write 96mb worth of data onto file. if has advice i'd appreciate it.

try writing array @ once, instead of 2 bytes-at-a-time.. like:

 save.write(world.worldgrid, sizeof(worldgrid));

see the docs


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