Question

I would like to know if having many NSLog() calls affects app performance or memory.
Does anyone know about such thing?

I want to put an NSLog() call in every function in my app (which is a lot) so that I can see
crash logs after and trace problems.

Thanks.

Answer 1

Yes. So I define this in my pch file.

#ifdef DEBUG
#   define DLog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__);
#else
#   define DLog(...)
#endif

// ALog always displays output regardless of the DEBUG setting
#define ALog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__);

Instead of using NSLog, I use DLog and ALog.

(Note or copyrights: I got this code long long ago from some other SO post which I don’t remember. Pasting it again from my snippet library)