compiling dmd

[Don]

On 28.12.2011 13:14, Timon Gehr wrote:
> On 12/28/2011 10:53 AM, Peter Alexander wrote:
>> On 27/12/11 8:40 PM, Andrei Alexandrescu wrote:
>>> On 12/27/11 2:38 PM, Walter Bright wrote:
>>>> On 12/27/2011 12:28 PM, Andrei Alexandrescu wrote:
>>>>> One good realization to make is how less efficient that makes you. You
>>>>> got used
>>>>> to that overhead so plentily, you consider it now par for the course.
>>>>
>>>> What takes time is running the unittests, not compiling dmd.
>>>
>>> Then _that_ is what you consider par for the course! :o)
>>>
>>> Andrei
>>
>> Has anyone looked into what causes the unittests to take so long? I find
>> it hard to believe that they need to take as long as they do.
>
> They have to be run for many different combinations of compiler flags iirc.
AFAIK there has never been a failure which wasn't with one of:
(no flags)
-O -release -inline
-g -O -release -inline

But why do the Phobos unit tests take so long? They used to take a 
matter of seconds, now they take forever.

On D1, they still take only about 10 seconds. On D2 they are now longer 
than the compiler tests with the minimal flag options.