How do I merge two containers efficiently with std::set in multithreaded code?

Merging two containers using `std::set` in multithreaded code can be achieved efficiently with the help of C++ Standard Library features. Here we outline how to perform this operation while ensuring thread safety and optimal performance.

C++, std::set, multithreading, thread safety, merge, containers, performance
This example demonstrates the efficient merging of two `std::set` containers in a multithreaded environment, ensuring minimal contention and maximum throughput.
#include <iostream> #include <set> #include <thread> #include <mutex> std::mutex mtx; void mergeSets(const std::set<int>& set1, const std::set<int>& set2, std::set<int>& result) { std::unique_lock<std::mutex> lock(mtx); // Locking for thread safety result.insert(set1.begin(), set1.end()); result.insert(set2.begin(), set2.end()); } int main() { std::set<int> set1 = {1, 2, 3, 4}; std::set<int> set2 = {3, 4, 5, 6}; std::set<int> mergedSet; std::thread t1(mergeSets, std::cref(set1), std::cref(set2), std::ref(mergedSet)); t1.join(); // Wait for thread to complete // Display results for (auto elem : mergedSet) { std::cout << elem << " "; } return 0; }

C++ std::set multithreading thread safety merge containers performance

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