Re: Why GNU coreutils/dd is creating a dummy file more efficiently than D's For loop?

[Daniel Kozak via Digitalmars-d-learn]

On Thu, May 23, 2019 at 11:19 PM Daniel Kozak <kozz...@gmail.com> wrote:

Fixed version without decode to dchar

void main()
{
    import std.range : array, cycle, take;
    import std.stdio;
    import std.utf;
    immutable buf_size = 8192;
    immutable buf = "\x00".byCodeUnit.cycle.take(buf_size).array;
    auto cnt = 50_000_000 / buf_size;
    immutable tail = "\x00".byCodeUnit.cycle.take(50_000_000 %
buf_size).array;
    File file = File("test.txt", "w");
    while(cnt--)
        file.rawWrite(buf);
    file.rawWrite(tail);
}