What is the performance impact of using lock_guard in C++?

What is the performance impact of using lock_guard in C++?

Using lock_guard in C++ can simplify thread management, but it may introduce some overhead due to locking.

How does it compare to using manual locks?

lock_guard provides exception safety and automatic unlocking, while manual locks require more careful management.

Are there scenarios where lock_guard should not be used?

Yes, in high-performance scenarios where locking overhead is critical, alternatives like spinlocks might be better.

Can you give an example of lock_guard in code?

Sure! Here's a simple example:

#include <mutex>
std::mutex mtx;
void threadFunction() {
    std::lock_guard<std::mutex> lock(mtx);
    // critical section
}