Book Image

Modern C++ Programming Cookbook - Second Edition

By : Marius Bancila
5 (1)
Book Image

Modern C++ Programming Cookbook - Second Edition

5 (1)
By: Marius Bancila

Overview of this book

C++ has come a long way to be one of the most widely used general-purpose languages that is fast, efficient, and high-performance at its core. The updated second edition of Modern C++ Programming Cookbook addresses the latest features of C++20, such as modules, concepts, coroutines, and the many additions to the standard library, including ranges and text formatting. The book is organized in the form of practical recipes covering a wide range of problems faced by modern developers. The book also delves into the details of all the core concepts in modern C++ programming, such as functions and classes, iterators and algorithms, streams and the file system, threading and concurrency, smart pointers and move semantics, and many others. It goes into the performance aspects of programming in depth, teaching developers how to write fast and lean code with the help of best practices. Furthermore, the book explores useful patterns and delves into the implementation of many idioms, including pimpl, named parameter, and attorney-client, teaching techniques such as avoiding repetition with the factory pattern. There is also a chapter dedicated to unit testing, where you are introduced to three of the most widely used libraries for C++: Boost.Test, Google Test, and Catch2. By the end of the book, you will be able to effectively leverage the features and techniques of C++11/14/17/20 programming to enhance the performance, scalability, and efficiency of your applications.
Table of Contents (16 chapters)
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Measuring function execution time with a standard clock

In the previous recipe, we saw how to work with time intervals using the chrono standard library. However, we also often need to handle time points. The chrono library provides such a component, representing a duration of time since the epoch of a clock (that is, the beginning of time as defined by a clock). In this recipe, we will learn how to use the chrono library and time points to measure the execution of a function.

Getting ready

This recipe is tightly related to the preceding one, Expressing time intervals with chrono::duration. If you did not go through that recipe previously, you should do that before continuing with this one.

For the examples in this recipe, we will consider the following function, which does nothing, but takes some time to execute:

void func(int const count = 100000000)
  for (int i = 0; i < count; ++i);

It should go without saying that this function is only meant for...