stdio line-streaming revisited

[torhu]

Andrei Alexandrescu (See Website For Email) wrote:
> On my machine, Tango does 4.3 seconds and the following phobos program 
> (with Walter's readln) does 5.4 seconds:
> 
> #!/usr/bin/env rundmd
> import std.stdio;
> 
> void main() {
>    char[] line;
>    while (readln(line)) {
>      write(line);
>    }
> }
> 
> where write is a function that isn't yet in phobos, of the following 
> implementation:
> 
> size_t write(char[] s) {
>    return fwrite(s.ptr, 1, s.length, stdout);
> }

On my Windows machine, using fwrite like that makes phobos twice as fast 
as the version using fputs.  But tango is still twice as fast as that.