How do I reserve capacity ahead of time with std::vector in performance-sensitive code?

C++, std::vector, reserve, performance optimization, memory management
Learn how to improve performance in C++ by reserving capacity for std::vector ahead of time to reduce memory reallocations and improve efficiency.
#include <iostream> #include <vector> int main() { // Create a vector of integers std::vector numbers; // Reserve memory for 1000 elements to avoid reallocations numbers.reserve(1000); // Add elements to the vector for (int i = 0; i < 1000; ++i) { numbers.push_back(i); } // Output the size of the vector std::cout << "Vector size: " << numbers.size() << std::endl; return 0; }

C++ std::vector reserve performance optimization memory management

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