Book Image

Advanced C++

By : Gazihan Alankus, Olena Lizina, Rakesh Mane, Vivek Nagarajan, Brian Price
5 (1)
Book Image

Advanced C++

5 (1)
By: Gazihan Alankus, Olena Lizina, Rakesh Mane, Vivek Nagarajan, Brian Price

Overview of this book

C++ is one of the most widely used programming languages and is applied in a variety of domains, right from gaming to graphical user interface (GUI) programming and even operating systems. If you're looking to expand your career opportunities, mastering the advanced features of C++ is key. The book begins with advanced C++ concepts by helping you decipher the sophisticated C++ type system and understand how various stages of compilation convert source code to object code. You'll then learn how to recognize the tools that need to be used in order to control the flow of execution, capture data, and pass data around. By creating small models, you'll even discover how to use advanced lambdas and captures and express common API design patterns in C++. As you cover later chapters, you'll explore ways to optimize your code by learning about memory alignment, cache access, and the time a program takes to run. The concluding chapter will help you to maximize performance by understanding modern CPU branch prediction and how to make your code cache-friendly. By the end of this book, you'll have developed programming skills that will set you apart from other C++ programmers.
Table of Contents (11 chapters)
6. Streams and I/O

Optimization Strategies

Optimization of code can be done in several ways, such as the following:

  • Compiler-based optimization
  • Source code micro-optimization
  • Cache-friendly code
  • Algorithmic optimization

Here, each technique has its pros and cons. We will examine each of these methods in detail in the upcoming sections. Roughly speaking, these are ordered in terms of effort required and also potential gains in performance. We'll look at compiler-based optimization in the next section.

Compiler-Based Optimization

Passing the correct options to the compiler can net many performance benefits. A real-world example of this is the Clear Linux distro (Linux distribution) that was created by Intel. This distro has been compiled to extract the maximum performance from all the code and outperforms most other Linux distributions by 30% on most benchmarks, which is a very significant speedup. On the gcc and clang family of compilers, the most basic option for optimization is -O&lt...