[Development] API review request: CBOR Stream reader and writer

[Thiago Macieira]

On segunda-feira, 22 de janeiro de 2018 01:37:40 PST Thiago Macieira wrote:
> CBOR parsing:
>         341,311535      task-clock
>        885.053.081      cycles
>      2.548.803.851      instructions
> 
> The string parser is still showing up at 70.5% of the full execution time,
> of which 33.4% are in QCborStreamReader and 20.4% calling isValidUtf8().
> The program spends 25,0% inside QIODevice, inside the string decoder.
> Unlike the JSON parser, we don't operate on a pre-read byte array, but
> directly on the QIODevice, checking for size.

I've further optimised isValidUtf8() and now the string parser is only 61% of 
the execution time, with isValidUtf8() down to 7.7%.

https://codereview.qt-project.org/217084 for the optimisations.

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center