...just think of performance constrained embedded platforms. But how do you make your C++ application faster? This talk will show you how to find bottlenecks in a C++ program using various tools. Then we will look into some solutions to common issues and top it off with some guidelines for new code. Abstract: Often one […]

The KDAB Training Day will be back in Berlin, at the H4 Hotel Berlin Alexanderplatz, on November 27th this year, right before the annual Qt World Summit, which will happen November 28-29th. Ideal to take part in both events! KDAB is well-known for its quality training courses around Qt/QML, Modern C++, Debugging and Profiling, OpenGL, […]

After more than a year of work, I'm pleased to release another version of heaptrack, the Linux memory profiler! The new version 1.1.0 comes with some new features, significant performance improvements and - most importantly - much improved stability and correctness. If you have tried version v1.0 in the past and encountered problems, update to […]

Starting next weekend, one of the most significant events on the Qt development and contribution calendar is taking place in Bilbao, Spain. The co-located and parallel-running Qt Contributor Summit and Akademy promise to push plans for Qt forward during the coming year. As an unconference, the format of the Qt Contributor Summit is designed to […]

KDAB is a Gold Sponsor at this year’s Meeting C++, a highly recommended 3-day hybrid event for the European C++ community. Locate the KDAB booth on the entrance level and talk to experts Ivan Čukić and Milian Wolff on any of the event days. At the booth, you will also get a live demo of […]

Hotspot is a standalone GUI designed to provide a user-friendly interface for analyzing performance data. It takes a perf.data file, parses and evaluates its contents, and presents the results in a visually appealing and easily understandable manner. Our goal with Hotspot is to offer a modern alternative to perf report, making performance analysis on Linux […]

I'm happy to announce the immediate availability of Heaptrack v1.5.0. Heaptrack is a heap memory profiler targeting mainly Linux, as well as FreeBSD. To learn more, please visit the project website. Version 1.5.0 incorporates about 70 changes since the v1.4.0 release from June last year. The highlights include: - Elfutils is now used for symbolizing […]

This blog will give you a brief overview of profiling C and C++ applications. Additionally, it will lay before you all of the tools available, with the purpose of aiding you in choosing the right tools at the right times. The Steps for Profiling Before we look at the actual tools, let's go over the […]

Hotspot 1.4.0 has been released! Hotspot is a replacement for perf report. It's a GUI for the perf profiler that takes a perf.data file, parses and evaluates its contents, and then displays the result in a graphical way. This feature release contains close to 400 commits since the last stable v1.3.0 release. It comes with […]

Version 1.3.0 of the KDE Heaptrack project was just released by KDAB's Milian Wolff. Heaptrack is a heap memory profiler on Linux-based operating systems. It can help you find hotspots that need to be optimized for reducing memory usage, memory leaks, allocation hotspots, and temporary allocations. Included in this release is a special new feature […]

This is the third and last installment of our series about full stack tracing. If you haven’t read them yet, you’ll probably want to check out the introduction and tool setup portions first. In this blog, we’re going to focus on visualizing and interpreting full stack traces. At this point, we’re going to assume that […]

If you’ve read the first article in this series, you’ll know what full stack tracing is and why you definitely want it. This time, we’ll show you how to setup full stack tracing on your Linux system. There are two steps – first get everything configured to capture a trace, and then view and interpret […]

Full stack tracing is a tool that should be part of every software engineer’s toolkit. It's the best way to investigate and solve certain classes of hard problems in optimization and debugging. Because of the power and capability it gives the developer, we’ll be writing a series of blogs about it: when to use it, […]

We have just released version 1.2.0 of Heaptrack, the fast heap memory profiler for C++/Linux applications. A bit of Background The Heaptrack fast heap memory profiler allows you to track all heap memory allocations at run-time. Afterwards, you can use the accompanying GUI tool to find optimization opportunities in your code by analyzing the recorded […]

We are pleased to announce a new release of our Hotspot Linux perf performance analysis GUI, Hotspot version 1.3.0! Hotspot is a replacement for perf reportthat takes a perf.data file, parses and evaluates its contents, and then displays the result in a graphical form. You can read a bit more about Hotspot here. Overview of […]

Working on color imagery for QiTissue recently, I realized we were accidentally losing the alpha channel in multiple places. For efficiency reasons, we keep colors in memory using the QRgb type, and convert that to/from QString for serialization purposes via QColor as needed. Here's what I discovered about why that doesn't work, and some ways […]

At Qt World Summit in 2019, KDAB offered five Introductory courses (one was given by our partner, froglogic), and three advanced classes., as follows: Introductory Course descriptions Introduction to Qt 3D Studio, trainer: Nuno Pinheiro This training introduces designers and developers to 3D content workflows and concepts, giving them a solid grounding in creating content […]

The agenda is published and KDAB engineers are offering a wealth of technical talks this year. Optimizing the Rendering of Qt Quick 2 applications, Giuseppe D'Angelo If you have ever wondered how Qt Quick applications are rendered to the screen, and how to use that knowledge to find and fix performance problems, then this talk […]

Sometimes it seems that we have nearly infinite memory resources, especially compared to the tiny 48K RAM of yesteryear’s 8-bit computers. But today’s complex applications can soak up megabytes before you know it. While it would be great if developers planned their memory management for all applications, thinking through a memory management strategy is crucial […]

At KDAB, we know that consistency is an important aspect of the User Experience - users don’t want to have to learn different ways to achieve the same thing. In the Linux world, there is a major structural pitfall to this: the applications written for Linux come in at least two major technologies - Qt […]