Read text file fast, how?

[John Colvin via Digitalmars-d]

On Monday, 27 July 2015 at 12:03:40 UTC, Johan Holmberg wrote:
> On Sun, Jul 26, 2015 at 5:36 PM, Andrei Alexandrescu via 
> Digitalmars-d < digitalmars-d at puremagic.com> wrote:
>
>>[...]
>
>
> Back on MacOS again, I thought I should try to run 
> "Instruments" on my program. I'm not familiar with the DMD 
> source code, but I did the following:
>
> [...]

IIRC D's tls is particularly slow on OS X