前几天版上讨论，翻到的一篇stack问答上的结论：

And if you ask about "std::unique_ptr" than visit this talk "CppCon 2019: Chandler Carruth “There Are No Zero-cost Abstractions” https://www.youtube.com/watch?v=rHIkrotSwcc

Its just not true, that unique_ptr is 100% cost free.

【 在 lambdai 的大作中提到: 】
: 没有memory的overhead，但是有cpu的cost
: There are no zero cost abstractions
: https://youtu.be/rHIkrotSwcc
: ...................
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你可以看下原始讨论

https://stackoverflow.com/questions/22295665/how-much-is-the-overhead-of-smart-pointers-compared-to-normal-pointers-in-c

别人问他如何得出这个结论，大拿的回答
I have no number to show, but you can find some in Nico Josuttis talk vimeo.com/131189627

【 在 lambdai 的大作中提到: 】
: 这个演讲里面有理有据，包括破坏abi的话有可能做到cost free
: 哪里不对呢
:
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