Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
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

Arrow left icon
Product type Paperback
Published in Jan 2019
Publisher Packt
ISBN-13 9781789531244
Length 384 pages
Edition 1st Edition
Languages
Tools
Arrow right icon
Author (1):
Arrow left icon
Marek Krajewski Marek Krajewski
Author Profile Icon Marek Krajewski
Marek Krajewski
Arrow right icon
View More author details
Toc

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

Profiling to Find Bottlenecks

As we already described in Chapter 1, Understanding Performant Programs, performance bottlenecks are not distributed evenly in code. Applying the Pareto principle to performance optimization, we could say that 80% of a program's execution time is spent on 20% of the code (and, as we've seen, Donald Knuth believed this to be an even lower figure). Regardless of the exact proportions, the basic insight is the same—code optimization efforts are most effectively spent on that critical x percent of the code that is responsible for most of the program's execution time.

We saw in the previous chapter that today's hardware platforms have grown to be so complicated that the ancient adage about programmers being notoriously bad at estimating bottlenecks in their own code has now been reinforced more than ever—not only do we...

You have been reading a chapter from
Hands-On High Performance Programming with Qt 5
Published in: Jan 2019
Publisher: Packt
ISBN-13: 9781789531244
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime