dmd makes D appear slow

[Paulo Pinto via Digitalmars-d]

On Wednesday, 3 June 2015 at 10:37:24 UTC, Ola Fosheim Grøstad 
wrote:
> On Wednesday, 3 June 2015 at 07:50:53 UTC, Paulo  Pinto wrote:
>> On Wednesday, 3 June 2015 at 07:05:37 UTC, Dicebot wrote:
>>> Project size is irrelevant here. I had 500 line C++ project 
>>> that took 10 minutes to compile (hello boost::spirit). It is 
>>> impossible for C++ to compile faster than D by design. Any 
>>> time it seems so you either aren't comparing same thing or 
>>> get misinformed. Or do straightforward separate compilation.
>>
>> Even C.
>
> Now really? C was designed at a time where you couldn't even 
> hold the source file in memory, so there is not even a need for 
> an explicit AST.
>
> C can essentially be "streamed" in separate passes: 
> cpp->cc->asm->linking
>
> If compiling C is slow, it is just the compiler or the build 
> system, not the language.

Yes really, specially when comparing with Turbo Pascal, Delphi, 
Modula-2, Oberon and a few other languages not tied to UNIX 
linker model.

Multiply that hour times HP-UX (aCC), Solaris (SunPro), Windows 
(cl), Aix (xlc), Red-Hat Linux (gcc). Which were the systems 
being used.

As a side note, Visual C++ 2015 will be quite fast.

http://channel9.msdn.com/Events/Build/2015/3-610

They literal have re-done their linker to use a database model 
and support incremental linking.

Similarly to what IBM did with Visual C++ Code Store and Lucid's 
Energize.

All the solutions have in common not relying in the traditional 
UNIX linker model.


--
Paulo