RFC: std.json sucessor
Ola Fosheim Gr via Digitalmars-d
digitalmars-d at puremagic.com
Fri Aug 22 23:25:33 PDT 2014
On Saturday, 23 August 2014 at 05:28:55 UTC, Walter Bright wrote:
> On 8/22/2014 9:48 PM, Ola Fosheim Gr wrote:
>> On Saturday, 23 August 2014 at 04:36:34 UTC, Walter Bright
>> wrote:
>>> On 8/22/2014 9:01 PM, Ola Fosheim Gr wrote:
>>>> Does this mean that D is getting resizable stack allocations
>>>> in lower stack
>>>> frames? That has a lot of implications for code gen.
>>>
>>> scopebuffer does not require resizeable stack allocations.
>>
>> So you cannot use the stack for resizable allocations.
>
> Please, take a look at how scopebuffer works.
I have? It requires an upperbound to stay on the stack, that
creates a big hole in the stack. I don't think wasting the stack
or moving to the heap is a nice predictable solution. It would be
better to just have a couple of regions that do "reverse" stack
allocations, but the most efficient solution is the one I
outlined.
With json you might be able to create an upperbound of say 4-8
times the size of the source iff you know the file size. You
don't if you are streaming.
(scopebuffer is too unpredictable for real time, a pure stack
solution is predictable)
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