Investigation: downsides of being generic and correct

[John Colvin]

On Friday, 17 May 2013 at 11:26:27 UTC, deadalnix wrote:
> On Friday, 17 May 2013 at 10:09:11 UTC, John Colvin wrote:
>> If naive D code has to be significantly faster than optimised 
>> C for people to not go "D sucks, it's only as fast as python" 
>> then we're pretty much doomed by peoples stupidity.
>
> No. The whole benefit of D is lost if you have to tweak 
> everything in complex way to get it run fast.

Define fast.

In some cases, if a naive call to a generic phobos function is as 
fast as an equivalent python library function then i'd say that's 
pretty good. Those python library functions are often 
impressively fast.