Chuck Silvers wrote:
>
> has the performance degradation caused by enabling DIAGNOSTIC been reduced
> sufficiently to no longer be a concern?  if not, then I'd think it would
> be worthwhile to investigate that before turning it on by default.
>
> frank, do you know specifically how to demonstrate the performance issue?
>   
I was running microbenchmarks at the time, comparing operating systems 
on the same hardware. DIAGNOSTIC had a 10% impact for a few tests, which 
was really too much.

On today's hardware, it's probably not that bad anymore, but I still 
don't think it should be enabled in releases.

- Frank