c++ refactoring of function

[bsjkb]

I have an array of numbers, for example: 1,2,3,4,5...,10

For every item the following function is called:

    do
     {
      if (..)
        {
         return_val= performsomething (parm1,parm2..parm5);
        }
     }

The function performsomething() is written like below:

    performsomething (x1,x2,...)
    {
     if (A_req?)
      {
       performA();
      }
     else if (B_req?)
      {
      performB();
      }
    }

Now, if it is seen closely, for every item the function performsomething() is getting called.

I want to avoid the performance overhead of these many function calls. I want to refactor the method performsomething() like it will check the conditions A_req? or B_req?. Accordingly, it will call performA() or performB(). I want to make performsomething() as 'inline' and call the underlying functions as needed.

Please help me how to code efficiently to achieve the above requirement .!.

[Todd Fleming]

On Saturday, January 20, 2018 at 10:42:02 AM UTC-5, bsjkb wrote:

Please help me how to code efficiently to achieve the above requirement .!.

This forum is not for these types of questions.

meta: It looks like the meaning of "This group is for discussion and Q&A about the current ISO C++ standard" is impenetrable for new users and non-native speakers.

Todd

[Richard Hodges]

> meta: It looks like the meaning of "This group is for discussion and Q&A about the current ISO C++ standard" is impenetrable for new users and non-native speakers.

I think in fairness "discussion and Q&A about the current ISO C++ standard" is a somewhat ambiguous term.

Shamik: suggest you post your question on stacko verflow. Although you'll want to flesh it out into a compilable snippet if you are to avoid being flamed by the somewhat merciless stack overflow community.

Link: https://stackoverflow.com/questions/tagged/c%2b%2b

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[Yubin Ruan]

I don't really understand your question totally, but do you want something
like computed goto? If so, see [1][2].

[1]: https://eli.thegreenplace.net/2012/07/12/computed-goto-for-efficient-dispatch-tables
[2]: https://gcc.gnu.org/onlinedocs/gcc/Labels-as-Values.html

--
Yubin

[Yubin Ruan]

On Sat, Jan 20, 2018 at 08:19:47AM -0800, Todd Fleming wrote:
>
> On Saturday, January 20, 2018 at 10:42:02 AM UTC-5, bsjkb wrote:
> >
> > Please help me how to code efficiently to achieve the above requirement .!.
> >
>
> This forum is not for these types of questions.

Does isocpp.org host any lists for this?

--
Yubin

[Thiago Macieira]

No.

--
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
Software Architect - Intel Open Source Technology Center

[Thiago Macieira]

On Sunday, 21 January 2018 03:18:21 PST Yubin Ruan wrote:
> I don't really understand your question totally, but do you want something
> like computed goto? If so, see [1][2].
>
> [1]:
> https://eli.thegreenplace.net/2012/07/12/computed-goto-for-efficient-dispat
> ch-tables [2]: https://gcc.gnu.org/onlinedocs/gcc/Labels-as-Values.html

GCC's computed gotos aren't completely implemented in C++. The alternate
syntax at the bottom of the page will fail to compile.