CompileTime performance measurement

[Stefan Koch via Digitalmars-d]

On Sunday, 4 September 2016 at 02:03:49 UTC, sarn wrote:
> On Sunday, 4 September 2016 at 01:53:21 UTC, Stefan Koch wrote:
>> Pragma msg can only print compiletime constants.
>> While __ctfeWriteln can print state while doing CTFE.
>
> Thanks, that makes a lot of sense.  Just to check, it prints to 
> standard error, right?
>
> Also, the issue of non-deterministic compilation reminds me of 
> the debate about allowing logging statements in pure functions.
>  Maybe there's a similar answer (i.e., making it only work in 
> some kind of debug mode).

This works already.
Anything placed in a debug {} block will be considered pure 
regardless.