#c++#zero-costabstractions#unique_ptr
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Advanced. Deep dive for people who know the field.
147K views7 years ago7 recommendations
Programming languagesSystems programmingC++Performance and optimizationCompilers and interpreters
Chandler Carruth argues that C++ abstractions always carry costs in runtime, compile time, or human effort, using unique_ptr as a case study.
CppCon.org — Discussion & Comments: reddit.com/r/cpp/ — Presentation Slides, PDFs, Source Code and other presenter materials are available at: github.com/CppCon/CppCon2019 — C++ is often described as providing zero-cost abstractions. Libraries offer up facilities documented as such. And of course, users read all of these advertisements and believe that the abstractions they are using are truly zero-cost. Sadly, there is no truth in advertising here, and there are no zero-cost abstractions. This talk will dive into what we mean by "zero-cost abstractions", and explain why it is at best misleading and at worst completely wrong to describe libraries this way. It will show case studies of where this has led to significant problems in practice as libraries are designed or used in unscalable and unsustainable ways. Finally, it will suggest a different framing and approach for discussing abstraction costs in modern C++ software. — Chandler Carruth Google — Videos Filmed & Edited by Bash Films: BashFilms.com Work at Hudson River Trading (HRT): tinyurl.com/safxfctfWhat people say. Highly recommended as a deep dive into the hidden costs of C++ abstractions and ABI constraints.
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