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)

Questions

Here are some questions so that you can test your understanding of the topics in this chapter:

  1. What does this mean: Apitrace preloads an instrumented implementation of OpenGL? Explain.
  2. Isn't there a way to use the gprof after all?
  3. How would you look for a lock convoy or a waiting chain causing your UI to stutter or, even worse, to freeze?
  4. What is the difference between CPU Usage (Precise) and CPU Usage (Sampled) in ETW traces?
  1. How would you find timers running amok or QML items accumulating video memory?
  2. What can you do when your favorite open source performance is not supported by Qt Creator?
  3. What is that thread and lock analysis feature some of the tools seem to have?
  4. If you try to launch the example program directly or from an external CPU profiler, this won't work. Why not? How do you fix it?
  5. If we don't use any custom ETW events in our program...