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Hands-On High Performance Programming with Qt 5

You're reading from   Hands-On High Performance Programming with Qt 5 Build cross-platform applications using concurrency, parallel programming, and memory management

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Product type Paperback
Published in Jan 2019
Publisher Packt
ISBN-13 9781789531244
Length 384 pages
Edition 1st Edition
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Author (1):
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Marek Krajewski Marek Krajewski
Author Profile Icon Marek Krajewski
Marek Krajewski
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Table of Contents (14) Chapters Close

Preface 1. Understanding Performant Programs 2. Profiling to Find Bottlenecks FREE CHAPTER 3. Deep Dive into C++ and Performance 4. Using Data Structures and Algorithms Efficiently 5. An In-Depth Guide to Concurrency and Multithreading 6. Performance Failures and How to Overcome Them 7. Understanding I/O Performance and Overcoming Related Problems 8. Optimizing Graphical Performance 9. Optimizing Network Performance 10. Qt Performance on Embedded and Mobile Platforms 11. Testing and Deploying Qt Applications 12. Assessments 13. Other Books You May Enjoy

Connecting databases

Sometimes, data files aren't just stored on disk to be freely used, but are managed by a database runtime system. Fortunately, Qt provides us with the possibility to talk to SQL databases by using its QtSql module. We will take a cursory look at this, but general database performance is a big and deep field and lies outside of the scope of this book.

Basic example using SQLite

For this example, we will use the SQLite lightweight, in-memory database, because it is exceptionally simple to use.

To work with SQLite databases, you first have to install the SQLite tools, as the SQLite driver that's needed by Qt is already included in its installation. Go to https://www.sqlite.org/download.html, download...

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