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 2

  1. What does it really mean when Apitrace preloads an instrumented implementation of OpenGL?
    This means exactly what is said here—Apitrace provides a DLL-implementing OpenGL functionality, which contains their tracing code. Preloading is a technique for loading a library manually, before the operating system has a chance to do so.
  2. Isn't there a way to use gprof after all?
    Yes, of course. Just don't use threads, and link everything statically. You just have to add the appropriate switch (-pg) to qmake's compiler and link options, and maybe add gprof as external too.
    For simpler projects, this could perhaps be an option, but simpler projects normally don't have many performance problems, and if they do, a quick evaluation with Process Explorer would probably disclose their causes.
  1. How would you look for a lock convoy or a waiting chain causing...