Re: [boost] [review] Convert library

Subject: Re: [boost] [review] Convert library
From: Joel de Guzman (djowel_at_[hidden])
Date: 2014-05-26 08:41:52

On 5/26/14, 7:59 PM, Vladimir Batov wrote:
> Vladimir Batov wrote
>>
>> Jeroen Habraken wrote
>>>> Vladimir Batov wrote
>>>> Or I'll just run raw Spirit.Qi example from
>>>> http://www.kumobius.com/2013/08/c-string-to-int/
>>>
>>> That's a nice solution, and should save quite a bit of headache.
>> Deployed the above code directly in a loop and via converter. Ubuntu
>> 14.04. gcc 4.8.2. Compiled with -O3. Ran te test quite a few times:
>> str-to-int spirit: raw/cnv=0.89/0.89 seconds.
>> str-to-int spirit: raw/cnv=0.89/0.89 seconds.
>> str-to-int spirit: raw/cnv=0.89/0.89 seconds.
>> str-to-int spirit: raw/cnv=0.89/0.89 seconds.
>>
>> The code to review is in the post_review branch. Corrections welcome.
>
> For comparison:
>
> str-to-int spirit: raw/cnv=0.89/0.89 seconds.
> str-to-int: strtol/scanf/lcast/sstream=2.49/9.71/3.78/9.78 seconds.
>
> impressive. Although getting spirit-related code to compile takes so-o-o-o
> many times longer. :-)

Yeah, the compiler will have to travel to the north pole and
ask some elves to fully optimize the code ;-) In the end, it will
be worth it. Promise!

There's an even faster solution, but the result will always be 42.
I'm not sure if you want that :-/

Regards,
-- 
Joel de Guzman
http://www.ciere.com
http://boost-spirit.com
http://www.cycfi.com/