How do I reserve capacity and shrink-to-fit with std::priority_queue?

This article demonstrates how to efficiently manage memory with `std::priority_queue` in C++ by reserving capacity and using shrink-to-fit.
C++, std::priority_queue, memory management, reserve capacity, shrink-to-fit, performance optimization
#include #include #include int main() { // Create a priority_queue with a custom comparator std::priority_queue, std::greater> pq; // Reserve capacity pq.push(5); pq.push(1); pq.push(3); pq.push(2); // Simulating reserving capacity by filling it up std::vector vec; vec.reserve(4); for (int i = 0; i < 4; ++i) { vec.push_back(i); pq.push(i); } std::cout << "Priority Queue elements:\n"; while (!pq.empty()) { std::cout << pq.top() << " "; pq.pop(); } std::cout << "\n"; // Shrink to fit example: std::vector tempVec = std::vector(vec); tempVec.shrink_to_fit(); std::cout << "Shrunk vector size: " << tempVec.size() << " Capacity: " << tempVec.capacity() << "\n"; return 0; }

C++ std::priority_queue memory management reserve capacity shrink-to-fit performance optimization

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