is "import std;" a valid approach or a violation of the D programming language?

[Max Haughton]

On Saturday, 15 May 2021 at 16:11:35 UTC, Andrei Alexandrescu 
wrote:
> On 5/15/21 9:59 AM, Witold Baryluk wrote:
>> I think `import std;` shouldn't be used for scripting. It just 
>> makes startup longer (which is important for scripts), and 
>> makes you vulnerable to future conflicts with new symbols in 
>> Phobos, which is a reality in anything other than most trivial 
>> scripts. Sure, it is a good start in rush to start with off, 
>> but nothing more.
>
> One reason why import std is expensive is that it instantiates 
> a bunch of templates (even if not used). That can be seen with 
> -vtemplates:
>
> https://run.dlang.io/is/MT6hvE
>
> I think we can improve on that.

If anything ever comes of it, the thing Stefan is playing around 
with (Tasks/Making dmd aware of dependencies inside itself) could 
make PAYG a science rather than a hack in future - i.e. do more 
work to understand where you can do nothing instead.