What's left to do for a stable D2?

[Andrei Alexandrescu]

Don wrote:
> bearophile wrote:
>> Thank you for your answers Simen kjaeraas.
>>
>>> No need for them when we have this: S s = S( 4 );<
>>
>> If you have to initialize an array of many structs you have to repeat 
>> the name of the struct many times, this is redundant, and takes more 
>> space (and if you don't use an IDE it needs more time to type):
>>
>> struct Vector2 { double x, y; }
>>
>> Vector2[] data1 = [{1,2}, {3,4}, {0,1}, {1,2}, {2,3}, {3,4}, {4,5}, 
>> {5,6}, {6,7},
>>                    {7,8}, {8,9}, {9,10}, {10,11}, {11,12}, {12,13}, 
>> {13,14},
>>                    {14,15}, {15,16}, {16,17}, {17,18}, {18,19}, {19,20}];
>>
>> Vector2[] data2 = [Vector2(0,1), Vector2(1,2), Vector2(2,3), 
>> Vector2(3,4),
>>                    Vector2(4,5), Vector2(5,6), Vector2(6,7), 
>> Vector2(7,8),
>>                    Vector2(8,9), Vector2(9,10), Vector2(10,11), 
>> Vector2(11,12),
>>                    Vector2(12,13), Vector2(13,14), Vector2(14,15), 
>> Vector2(15,16),
>>                    Vector2(16,17), Vector2(17,18), Vector2(18,19), 
>> Vector2(19,20)];
>>
>> void main() {}
> 
> That's interesting. I would tend to use a function to initialize such 
> things, though, so I suspect such use cases are quite rare. Note that 
> C-style struct initializers add a lot of complexity to the language.
> 
> 
>>> Literals are allocated in the static data segment, and thus should be 
>>> immutable.<
>>
>> In Python I am used to modify the contents of array (list) literals, 
>> for example I can initialize them to some values and then change them. 
>> So I'd like array literals to be mutable, but I can live with them 
>> being immutable and dup them where necessary.
> 
> Currently, any use of array literals in D is a performance disaster.
> Two days ago, I found that by changing one line of code in my app from:
> immutable int [] setbits = [ 1, 2, 4, 8, 16, 32, 64, 128];
> into
> static immutable int [] setbits = [ 1, 2, 4, 8, 16, 32, 64, 128];
> 
> my entire app became about 5 times faster. That is ridiculous.
> And such a clumsy syntax for something so simple.

Is this is bugzilla yet? FWIW I also submitted a related performance bug.

Andrei