Mingw

[anirban]

In this compiler how can I force a function to be inline?

[whiteflags]

Is that really the standard way? Only class methods can be inline, and I believe the only way to really force inlining is compiler dependent. The keyword inline is something that the compiler may ignore ( but it tries not to ).

Unless you use a macro or something. But don't do that.

[anirban]

But we can declare non-class member function inline too! Yes it is true i is compiler dependent but can't we force inline in mingw as we use __forceinline in VC++?

[whiteflags]

Mingw does not define __forceinline. In general that's a bad idea to force inline functions, anyway, so you're probably better off finding another way to deal with your performance problem. Try using inline first; see if that does anything to help. And prove it's just as slow before you come back.

[swgh]

The problem witth function inlining is yes it can speed up the excution time, but this does come at the expense of a larger program size. The thing that can be hard to balance is program performance and program speed. Inlining a function is usually only done after you have the program working. If, you can see any bottlenecks in the code, then perhaps inlining a function to get a more effective result could be implemented. ( that is down to the compiler as citizen stated )