[webkit-dev] Easing printf based debugging in WebKit with an helper.

[Shezan Baig]

On Fri, Jul 20, 2012 at 10:53 AM, Shezan Baig <shezbaig.wk at gmail.com> wrote:
> On Fri, Jul 20, 2012 at 7:46 AM, Konstantin Tokarev <annulen at yandex.ru> wrote:
>>
>> 19.07.2012, 22:20, "Filip Pizlo" <fpizlo at apple.com>:
>>> Now consider the stream form:
>>> thingy << "foo " << a << " bar " << someWeirdNonsenseToEnableHex << b << " baz " << c << endl;
>>> This is 8 procedure calls and three string constants. This code will be somewhere around 8 times fatter. Hence, you will be less likely to want to enable such debug statements in release builds both due to fears concerning unnecessary increases in binary size, and unnecessary increases in compile times.
>>
>> Well, if all << operators are inline, it will be optimized. You also don't have to add endl, because "thingy" can add '\n' and flush buffer at the end by default (like qDebug does)
>>
>
>
> Also, if "START_THINGY" and "END_THINGY" are defined as:
>
> #define START_THINGY  if (enableDebug) { thingy
> #define END_THINGY    << endl; }
>


And we could also wrap these macros with #ifdef ENABLE_THINGY, so even
the compile-time cost is eliminated if we don't want to include thingy
output in our build.