Summary
This episode explores the differences between emplace_back() and push_back() in C++ standard containers, examining both their semantic differences and performance characteristics. Jason demonstrates that emplace_back() constructs objects in-place with their constructor arguments, while push_back() adds pre-constructed objects or copies/moves them into the container. Through benchmarking different approaches using Quick Bench, he shows that emplace_back() can offer better performance in certain cases, particularly when compared to push_back() with copying, and aligns with best practices for object creation and lifetime management.