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  • Your Performance Todo List: The Most Important Performance Opportunities and Pitfalls to Remember About

    This is the interactive slide deck for my CppCon 2022 talk. Writing efficient programs is hard. This is because it requires a lot of knowledge, experience and strategic thinking. There have been many talks on optimization and often each addresses a single concept. Being able to achieve a bird’s eye view of factors affecting performance often requires many hours of researching the topic. To lessen the mental burden of optimizing programs, I have picked out the techniques, I believe are most important. During the talk, I will present them in an organized manner and provide practical examples of how they can be applied. I will first discuss what I believe are the main goals efficient programs strive to achieve. Then, I will present the general methods of achieving those goals. Then, for the majority of the talk, we will discuss a few dozen performance opportunities. For each of them, I will explain the underlying mechanism of how the optimisation works. I will avoid bluntly giving guidelines to follow without explanation. Each of the techniques naturally comes with its costs, and those will be discussed as well. I will additionally discuss various performance pitfalls. These are sometimes called “premature pessimisations” in contrast to the often used term of “premature optimizations”. I will show examples of optimizations which do not incur any cost on program readability or ma

    Apr 26, 2022 1,633 18

  • GIT

    Apr 05, 2022 587 0

  • OOP Part 9

    May 15, 2021 685 0

  • RTTI

    May 14, 2021 765 0

  • Multiple Inheritance

    Apr 22, 2021 631 0

  • Polymorphism

    A presentation about polymorphism: ad hoc polymorphism - function overloading and operator overloading, parametric polymorphism - templates - and dynamic polymorphism - virtual functions as well as nested classes. Also on the show: vtables, abstract classes, override, final, interfaces and slicing.

    Apr 06, 2021 697 0

  • Smart Pointers and Inheritance

    A presentation about different ways of taking function parameters and returning values from functions and smart pointers such as std::unique_ptr, std::shared_ptr, std::weak_ptr as well as public inheritance and the protected qualifier, in-class using-declarations, base class member shadowing and the basics of polymorphism. It is presented here: https://www.youtube.com/watch?v=pIj3C6sveUM .

    Mar 15, 2021 681 0

  • Ownership and Copy & Move Semantics

    A presentation about ownership, copy semantics and move semantics covering copy constructors, move constructors, copy assignment operators, move assignment operators, the rule of 0, the rule of 5, as well as value categories, exception guarantees and the copy-swap idiom. It is presented here: https://www.youtube.com/watch?v=zN45skruTvI .

    Mar 07, 2021 620 0

  • Object Oriented Programming Part 3

    A presentation about member pointers, user defined conversions, friends and operator overloading in C++. It is presented here: https://www.youtube.com/watch?v=C1javGeyR_w .

    Feb 10, 2021 630 0

  • RAII

    A presentation about constructors, destructors and RAII. It is presented here: https://www.youtube.com/watch?v=yDrIHAS2JgY .

    Jan 26, 2021 626 0

  • OOP in C++ Part I

    A presentation about programming paradigms and their applications to C++. It is presented here: https://www.youtube.com/watch?v=fzpzCVNQva8 .

    Jan 16, 2021 651 0

  • Errors

    A presentation about compilation errors, the as-if rule, undefined behavior, implementation defined behavior, error codes, std::optional, std::abort, exceptions. It is presented here: https://www.youtube.com/watch?v=ASOc73uTsdo .

    Dec 11, 2020 704 0

  • Functions

    A presentation about noexcept functions, try catch functions, inline functions and variables, function overloading, default function parameters, lambdas (unnamed functions), function pointers, and constexpr (consteval,constinit) functions and variables in C++ as well as std::function. It is presented here: https://www.youtube.com/watch?v=Sqaocm3f7OY .

    Dec 10, 2020 681 0

  • Random Things

    A presentation about many different C++ features. It is presented here: https://www.youtube.com/watch?v=xvxlPMNQuRM .

    Dec 03, 2020 589 0

  • Low level performance

    A presentation about cache and branch prediction. It is presented here: https://www.youtube.com/watch?v=qicj1F88H78 .

    Nov 26, 2020 585 0

  • Lifetime and References

    A presentation about the lifetime and references in C++. It is presented here: https://www.youtube.com/watch?v=3TG_hnd3qqg .

    Nov 06, 2020 573 0

  • Memory and Pointers

    A presentation about the memory and pointers in C++. It is presented here: https://www.youtube.com/watch?v=CSKsKfSJq6w .

    Nov 05, 2020 604 0

  • The C++ Build Pipeline

    A presentation about the C++ build pipeline. It is presented here: https://www.youtube.com/watch?v=Ev8DrjtBtNg .

    Oct 24, 2020 674 1

  • Rynek

    Oct 11, 2020 619 3