New vs length on dymamic array

[user1234]

On Monday, 9 November 2020 at 08:06:54 UTC, Andrey wrote:
> Hello,
>
> Are here any differences in creation of dynamic array with 
> known size?
>
>> auto array = new wchar[](111);
>
> and
>
>> wchar[] array;
>> array.length = 111;

It's the same. If the two are valid then you are in a function. 
So it's an alloca for the dynamic array payload (8+8 bytes on 
x86_64) then a LengthExpression that will lead to a GC.malloc, 
and finally a memset for all the elements default values.