stdio performance in tango, stdlib, and perl

[kris]

Andrei Alexandrescu (See Website For Email) wrote:
> kris wrote:
> 
>> Andrei Alexandrescu (See Website For Email) wrote:
>> [snip]
>>
>>> Oh, but I forgot it's cheating: uses read/write so it's incompatible 
>>> with C's stdio, which phobos is.
>>
>>
>> How can it possibly be "cheating" when the code was in place before 
>> you contrived this test ;)
>>
>> I think you have to stretch a bit to find some /common/ and truly 
>> valid cases where what you refer to is important enough to warrant 
>> such attention.
>>
>> If it truly were to become an issue (people actually run into problems 
>> with it on a regular basis) then tango.io could be changed to 
>> special-case this kind of thing; but at this time we prefer to avoid 
>> such things and adhere to the KISS principal instead.
> 
> 
> "Principle" I guess. 

Yep. A thousand pardons for my late night spelling mistake. I'll be sure 
to reciprocate in future also, if that would be helpful?


> That sounds great. My opinion in the matter is 
> simple - D's stdio use C's FILE*, stdio lib, and all. Moreover, it gives 
> the programmer full access to them. It would be only nice, if it does 
> not cost too much, to not be gratuitously incompatible with them. That's 
> all. If you want to take the other route, you better disable access to 
> C's getchar et al.

Yes, thanks for that option. It is certainly one approach that has been 
considered before, and a trivial one to implement. We'll probably cross 
that bridge when we reach it. It's worth noting, however, that Tango is 
focused for usage with D programs; not C

BTW: the use of gratuitous here is wholly out of context; some might 
interpret the usage as an implication that Tango is based upon a whim ;)

> 
>> FWIW, tango.io could trivially be sped up significantly on this 'test' 
>> -- as it stands, the implementation is quite pedestrian in nature ;)
> 
> 
> The 'test' is not a 'test', it's a test deriving from my attempts to 
> find the bottleneck in a real D program.

It's being referred to as a "benchmark" Andrei; I was trying to be 
somewhat less political by calling it a 'test'. Many pardons