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C + + Learning -- about code performance optimization

2021-08-07 23:43:27 Shuimu Silver Orange

Related performance optimization :

Optimization at the container level :
Use emplace Instead of insert
Use emplace_back() Instead of push_back() (http://c.biancheng.net/view/6826.html)
emplace_back() and push_back() The difference between , The difference lies in the mechanism of the underlying implementation .push_back() When you add elements to the end of the container , This element will be created first , Then copy or move the element into the container ( If it's a copy , After that, it will destroy the previously created element ); and emplace_back() At the time of implementation , The element is created directly at the end of the container , It eliminates the process of copying or moving elements .

About performance optimization :
C++ performance optimization ( Two )——C++ The object model
https://blog.51cto.com/u_9291927/2388807
C++ Speed optimization of https://blog.csdn.net/tktp_ht/article/details/84386614

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