Optimization examples

"If you pass that by value one more time..."

• Use Const reference by default.

• Move semantic (TODO).

• Return value optimization (TODO).

std::vector<> is your best friend

• Use std::vector<>::reserve by default

• "I have learnt linked-lists at university, should I use them?" Nooope.

• You don't need a std::map<> for that (TODO).

• Small vector optimization (TODO).

"It is just a string, how bad could that be?"

• Strings are (almost) vectors

• When not to worry: small string optimization.

• String concatenation: the false sense of security of std::string::operator+ (TODO).

• std::string_view: love at first sight (TODO).

Don't compute things twice.

• Example: 2D/3D transforms the smart way (TODO).

• Double for-loop: less elegant, more performant version (TODO).

Fantastic data structures and where to find them.

github地址：https://github.com/facontidavide/CPP_Optimizations_Diary