D compiles fast, right? Right??

[Andrei Alexandrescu]

On 04/02/2018 08:35 AM, Atila Neves wrote:
> On Sunday, 1 April 2018 at 02:40:26 UTC, Walter Bright wrote:
>> On 3/30/2018 1:17 PM, Andrei Alexandrescu wrote:
>>> Could be faster.
>>
>> It's been a fair amount of time since somebody has done profiling of 
>> dmd. It needs to be done. There's probably plenty of low hanging 
>> fruit. Speculating about why it is slow is pointless without data.
> 
> I profiled it as soon as I had the numbers. I didn't bother to mention 
> it because I thought I'd just work on making dmd faster instead.
> 
> I seem to be the one who feels the most pain by this, it'd be silly of 
> me to expect anyone else to work on it.

A large and obvious time sink is that unittests in library code are 
built when user code is to be unittested. I'd recommend doing this 
before any other optimization.