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Oh no. Exceptions are not slow in C++. This is a myth invented by people who do not fully understand Exceptions. Exceptions are, as a matter of fact, fast.It is necessary to understand that Exceptions are not another branch structure such as “while” or “if”. Exceptions are designed only to control situations that happen exceptionally. When you understand this important point, you conclude that Exceptions are fast. They are as fast as you can manually implement exception handling. Normally, even you cannot manually implement exception handling as efficient as Exceptions are implemented in the language.If you use Exceptions to control the flow of a program, yes, they are terribly slow. But this is because you are using an incorrect tool to do something that should be done using regular flow control structures (like: if, while, switch, return, etc.), not Exceptions.Exceptions are a powerful tool that has the enormous ability to undo everything that has been done from the “try” clause to the “throw” clause and jump directly to the “catch” clause, carrying vital information. Wow! This is spectacular, but it should be used only when you really need to undo everything done, not when you just need a branch clause.The important point is that Exceptions are fast to do what they do, but obviously slow to replace a simple branch. Also take into account that, Exceptions DO NOT consume any CPU time if they do not throw. Therefore, your program should be designed to throw Exceptions exceptionally, only when it is worth to do everything that is done with an Exception.Answering your question, I must say that I have not measured the “speed” of Exceptions in languages ​​other than C++, therefore, it is impossible for me to tell you how efficient those other alternatives are. However, I can tell you that, IMHO, Exceptions in C++ cannot be implemented faster than they are already implemented.Well, to tell you the truth, there is only one thing faster than Exceptions in C++, and it is not controlling exceptions at all. That is, when something exceptional happens, let the user get rid of his luck. Unfortunately, this alternative, as stupid and incredibly as it may seem, is the attitude selected by many large corporations.———————— Example ————————The following is a simple, and very incomplete, example (maybe funny also), just to give you an idea of the correct and bad use of Exceptions. Suppose you have a program that manages two type of Vehicles: Cars and Airplanes:struct Vehicle {  virtual ~Vehicle() {} };  struct Car : public Vehicle {  void drive() {std::cout << "Car is running\n";} };  struct Airplane : public Vehicle {  void fly() {std::cout << "Airplane is flying\n";} }; Good use of Exceptions:Now you are writing a function that expects to receive only Airplanes, unless the user does something very stupid that does not normally happen.void tower_onlyForAirplanes(Vehicle& v) {  // dynamic_cast, with references, throws if it can't cast.  Airplane &a = dynamic_cast<Airplane&>(v);  a.fly(); }  int main() {  std::vector<Vehicle*> hangar;  hangar.push_back(new Airplane());  hangar.push_back(new Airplane());  hangar.push_back(new Car()); // Oops, some idiot stored his car into the hangar!    try  {  for(auto airplane : hangar)  tower_onlyForAirplanes(*airplane);  }  catch(std::bad_cast&)  {  std::cout << "Tower: A stupid is requesting permission to takeoff with a Car!\n";  // Here do something important to correct this anomaly.  throw; // As tower can't handle this, it’s re-thrown to be handled by a superior.  } } Output:Airplane is flying Airplane is flying Tower: A stupid is requesting permission to takeoff with a Car! Bad use of Exceptions:On the contrary, you are now writing a function that will receive different types of Vehicles and will do different things depending on the Vehicle received. The following is the way it should NOT be programmed, because you are using Exceptions to control the normal flow of the program:void for_all_vehicles_bad(Vehicle& v) {  // dynamic_cast, with references, throws if it can't cast.  try  {  Airplane &a = dynamic_cast<Airplane&>(v);  a.fly();  }  catch(...)  {  try  {  Car &c = dynamic_cast<Car&>(v);  c.drive();  }  catch(...)  {  std::cout << "Unknown vehicle\n";  }  } }  int main() {  std::vector<Vehicle*> vehicles;  vehicles.push_back(new Airplane());  vehicles.push_back(new Car());  vehicles.push_back(new Airplane());  vehicles.push_back(new Car());   for(auto vehicle : vehicles)  for_all_vehicles_bad(*vehicle); } How it should be coded:Not using Exceptions, is the right way to write the previous example:void for_all_vehicles_good(Vehicle& v) {  // dynamic_cast, with pointers, returns nullptr if it can't cast.  if(Airplane *a = dynamic_cast<Airplane*>(&v))  a->fly();  else if(Car *c = dynamic_cast<Car*>(&v))  c->drive();  else  std::cout << "Unknown vehicle\n"; }  int main() {  std::vector<Vehicle*> vehicles;  vehicles.push_back(new Airplane());  vehicles.push_back(new Car());  vehicles.push_back(new Airplane());  vehicles.push_back(new Car());   for(auto vehicle : vehicles)  for_all_vehicles_good(*vehicle); } As you can see, “if” and “else” clauses is the right way here, to control the program flow, because it isn't exceptional that a Vehicle be an Airplane or a Car.He is an exceptionally tall man.Regards.If this answer was helpful, Please UPVOTE and consider following me-Mario Galindo Queralt.

Bangladesh. Not only for foreigner but also for Bangladeshis as well.Here are two images of the capital Dhaka:Just see, buses, cars, motorbikes, rickshaws (three wheeler manual vehicle) and even pedestrians on road. I guess 90% drivers have no idea what is the function of lanes on road. They change lanes just they wish. Cars from left lane turns right in an intersection (we drive on left) or vice versa. From nowhere rickshaws come in front of buses and slows down all the traffic behind it.Buses take and drop passengers any place they want, even middle of the road, in the middle lane. If you are driving beside a bus, you have to be a cautious more than a pilot engaged in a dog-fight because you don’t know when someone will get down from a running bus in the middle of a street.Highways are more dangerous. Most highways are two lanes both ways, no divider. Buses and trucks sometimes drive like they are on F1 competition, particularly at night. In the day time, you will face lots of local manual or semi-auto vehicles on highways coming from nowhere. Motorbike accidents are common because cows, goats, dogs jump in front of your bike.

Will they postpone neet 2020? Even if they, when can they do it?In the recent interview he said that, we are discussing regarding NEET & JEE with other ministers and will update their decision, whenever, we reach any conclusion , but we are trying our best to conduct exam on given date. MHRD ministers are trying their best to conduct the examination on time.present scenariocases are increasing rapidly.All trains have been cancelled till augustLockdown extended till 31st July (in some states)Imagine if any +ve aspirant came in contact with other aspirantsWho will held responsible for that innocent soul ?Not everyone is rich or has nearby center many have to travel 100–200km - so who will guarantee the bus ,auto (vehicle is properly sanitized)Will they postpone neet 2020? Even if they, when can they do it?99% yes 1% NoStudents are mass tweeting on tweeter still they aren’t getting any reply - so I can understand your frustrationGetting different answer in each interview - (10 lakhs download —————,NTA ABHYAS APP)SoTry to control yourselfstay calm -I know saying is easy but you have to channelize your energy - and keep studying (don’t waste time , if you are tweeting just tweet and go back to study -)Atleast you will get edge over others (even if they postpone )They are working on it they may report on 3 july (expected)Stay away from rumors -Edit -Keeping in mind the safety of students and to ensure quality education we have decided to postpone JEE & NEET examinations. JEE Main examination will be held between 1st-6th Sept, JEE advanced exam will be held on 27th Sept & NEET examination will be held on 13th Sept.All the best