What are some performance optimizations for std::vector in C++11?
An example of an AI chatbot conversation about C++11 std::vector performance optimizations.
What are some performance optimizations for std::vector in C++11?
In C++11, you can optimize std::vector performance by using move semantics, reserving space, and utilizing emplace_back.
How does move semantics improve performance?
Move semantics allow resources to be transferred rather than copied, reducing overhead and improving efficiency.
What does reserving space do for std::vector?
Reserving space with vector::reserve prevents multiple reallocations, which can be costly in terms of performance.
Can you explain emplace_back and how it differs from push_back?
emplace_back constructs an object in place at the end of the vector, avoiding a copy, while push_back requires a copy or move.
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