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C++17's std::pmr Comes With a Cost

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Overview

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This talk introduces C++17’s polymorphic allocator model and examines its effects on move semantics, testing, performance, developer productivity, and reliability. It offers recommendations for when and how to use std::pmr in large codebases.

Syllabus

Introduction
Trick question
Read the code
Outline
Fragmentation
Complexity
Synchronized Pool
Unsynchronized Pool
Logging Resource
Setting Default Resource
Example
Undefined Behavior
Exception Safety
Polymorphic
Alligator Awareness
Default constructor
PMR Dirty Little Secret

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CppNow

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