Book Image

Hands-On High Performance Programming with Qt 5

By : Marek Krajewski
5 (1)
Book Image

Hands-On High Performance Programming with Qt 5

5 (1)
By: Marek Krajewski

Overview of this book

Achieving efficient code through performance tuning is one of the key challenges faced by many programmers. This book looks at Qt programming from a performance perspective. You'll explore the performance problems encountered when using the Qt framework and means and ways to resolve them and optimize performance. The book highlights performance improvements and new features released in Qt 5.9, Qt 5.11, and 5.12 (LTE). You'll master general computer performance best practices and tools, which can help you identify the reasons behind low performance, and the most common performance pitfalls experienced when using the Qt framework. In the following chapters, you’ll explore multithreading and asynchronous programming with C++ and Qt and learn the importance and efficient use of data structures. You'll also get the opportunity to work through techniques such as memory management and design guidelines, which are essential to improve application performance. Comprehensive sections that cover all these concepts will prepare you for gaining hands-on experience of some of Qt's most exciting application fields - the mobile and embedded development domains. By the end of this book, you'll be ready to build Qt applications that are more efficient, concurrent, and performance-oriented in nature
Table of Contents (14 chapters)

An In-Depth Guide to Concurrency and Multithreading

In this chapter, we will focus on performance improvements that can be achieved with threads and concurrency. We will learn about different concurrency mechanisms, thread usage, communication between threads, and guidelines for good concurrent performance.

As this is a mid-level book, we won't present the basic thread usage but will rather concentrate on the performance aspects of multithreading and parallel processing.

This chapter will discuss the following topics:

  • Concurrency, parallelism, and multithreading: Introducing the basic concepts and classic problems
  • Threading support classes in Qt: Overview of the classes we can work with
  • Threads, events, and QObjects: How the QObject and QThread fit together
  • Higher-level Qt concurrency mechanisms: How not to worry about locking
  • Multithreading and performance: How to speed...