json parsing performance

[weaselcat via Digitalmars-d]

On Monday, 6 April 2015 at 21:09:32 UTC, Brad Anderson wrote:
> On Monday, 6 April 2015 at 20:20:06 UTC, Kingsley wrote:
>> I have read that std.json is pretty slow compared to other 
>> languages json parsers and I'm about to do a whole stack of 
>> json parsing and was wondering if anyone has got any 
>> benchmarks to indicate what "slow" means compared to other 
>> languages - particularly java, ruby, python?
>>
>> I want to know whether to roll up the sleeves and write my own 
>> json parser focused on performance or if slow just means a few 
>> ms slower - which I could live with.
>
> We actually have a JSON parser meant to replace std.json that 
> should be very high performance. You can try it out now using 
> dub:
>
> http://code.dlang.org/packages/std_data_json
>
> I used it recently though I didn't do any performance testing. 
> The improvements to Algebraic would help make it more pleasant 
> to use.

Which improvements to algebraic?