Book Image

C++ High Performance - Second Edition

By : Björn Andrist, Viktor Sehr
5 (2)
Book Image

C++ High Performance - Second Edition

5 (2)
By: Björn Andrist, Viktor Sehr

Overview of this book

C++ High Performance, Second Edition guides you through optimizing the performance of your C++ apps. This allows them to run faster and consume fewer resources on the device they're running on without compromising the readability of your codebase. The book begins by introducing the C++ language and some of its modern concepts in brief. Once you are familiar with the fundamentals, you will be ready to measure, identify, and eradicate bottlenecks in your C++ codebase. By following this process, you will gradually improve your style of writing code. The book then explores data structure optimization, memory management, and how it can be used efficiently concerning CPU caches. After laying the foundation, the book trains you to leverage algorithms, ranges, and containers from the standard library to achieve faster execution, write readable code, and use customized iterators. It provides hands-on examples of C++ metaprogramming, coroutines, reflection to reduce boilerplate code, proxy objects to perform optimizations under the hood, concurrent programming, and lock-free data structures. The book concludes with an overview of parallel algorithms. By the end of this book, you will have the ability to use every tool as needed to boost the efficiency of your C++ projects.
Table of Contents (17 chapters)
15
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16
Index

Real-world examples of metaprogramming

Advanced metaprogramming can appear to be very academic, so in order to demonstrate its usefulness, let's look at some examples that not only demonstrate the syntax of metaprogramming, but how it can be used in practice.

Example 1: creating a generic safe cast function

When casting between data types in C++, there is a multitude of different ways things can go wrong:

  • You might lose a value if casting to an integer type of a lower bit length.
  • You might lose a value if casting a negative value to an unsigned integer.
  • If casting from a pointer to any other integer than uintptr_t, the correct address might become incorrect. This is because C++ only guarantees that uintptr_t is the only integer type that can withhold an address.
  • If casting from double to float, the result might be int if the double value is too large for float to withhold.
  • If casting between pointers with a static_cast(), we might get...