Have you had experience optimizing application or software performance?

Performance optimization in C/C++ often involves bottleneck analysis using profilers (e.g., gprof, Valgrind). Main approaches:

• Minimizing memory allocations and optimizing them.
• Using efficient algorithms and data structures.
• Function inlining to reduce call overhead.
• Loop optimization (parallelization, reducing iterations).
• Utilizing compiler features, such as optimization flags (-O2, -O3).

Example of function inlining:

inline int square(int x) {
    return x * x;
}

It is also important to avoid unnecessary object copying, and to use references and move semantics when applicable.