Making byLine faster: we should be able to delegate this

[Steven Schveighoffer via Digitalmars-d]

On 3/22/15 3:03 AM, Andrei Alexandrescu wrote:

> * assumeSafeAppend() was unnecessarily used once per line read. Its
> removal led to a whopping 35% on top of everything else. I'm not sure
> what it does, but boy it does takes its sweet time. Maybe someone should
> look into it.

That's not expected. assumeSafeAppend should be pretty quick, and 
DEFINITELY should not be a significant percentage of reading lines. I 
will look into it.

Just to verify, your test application was a simple byline loop?

-Steve