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)

Chapter 11

  1. Why would you like to test a Qt application?
    First of all, for correctness, and then for regression, and also for regressions in performance—remember Qt performance-regression tests and https://testresults.qt.io/grafana/?
  2. How would you implement a performance-regression test measuring the FPS rate of a QML application?
    We already developed a graphical FPS display in Chapter 8, Optimizing Graphical Performance. We could use the same technique of hooking into signals emitted by the QML scene graph and computing the needed statistics.
  3. Any ideas about deploying Qt application to embedded Linux? Take some hints from the previous chapter.
    As we discussed in the previous chapter, Qt Creator supports the copying of a cross-compiled binary to a target device. When the development is finished, the executable will be included as a separate packet in the Linux build tool...