Major performance problem with std.array.front()

[Dmitry Olshansky]

09-Mar-2014 21:45, Andrei Alexandrescu пишет:
> On 3/9/14, 10:21 AM, Vladimir Panteleev wrote:
>> On Sunday, 9 March 2014 at 17:18:47 UTC, Andrei Alexandrescu wrote:
>>> On 3/9/14, 5:28 AM, Joseph Rushton Wakeling wrote:
>>>> So IIUC iterating over s.byChar would not encounter the
>>>> decoding-related
>>>> speed hits that Walter is concerned about?
>>>
>>> That is correct.
>>
>> Unless I'm missing something, all algorithms that can work faster on
>> arrays will need to be adapted to also recognize byChar-wrapped arrays,
>> unwrap them, perform the fast array operation, and wrap them back in a
>> byChar.
>
> Good point. Off the top of my head I can't remember any algorithm that
> relies on array representation to do better on arrays than on
> random-access ranges offering all of arrays' primitives. But I'm sure
> there are a few.

copy to begin with. And it's about 80x faster with plain arrays.


-- 
Dmitry Olshansky