Templates are slow.

[jmh530 via Digitalmars-d]

On Thursday, 8 September 2016 at 05:02:38 UTC, Stefan Koch wrote:
>
> If you are instantiating a template inside another template 
> think very hard about the reason, often you can "inline" the 
> template body of the inner template and get an instant speed 
> win right there.
> (Don't do this preemptively, ONLY when you know that this 
> template is a problem!)
>

What about functions in std.algorithm, like reduce, that have 
templates with multiple functions within them and the headline 
function will call private impl functions within them?