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Heaptrack v1.0.0 Release First stable release of the fast Linux heap memory profiler

I’m extremely happy to finally announce the first stable release of heaptrack, the FOSS heap memory profiler for C/C++ Linux applications. You can download the source tarball from the KDE mirrors:

Heaptrack is a fast heap memory profiler that runs on Linux. It allows you to track all heap memory allocations at run-time. Afterwards, the accompanying GUI tool can be used to find optimization opportunities in your code by analyzing the recorded profiling data. It allows you to:

  • Inspect

GammaRay 2.7.0 Released

We have released version 2.7 of our Qt application introspection tool GammaRay. GammaRay allows you to observe the behavior and data structures of Qt code inside your program live at runtime.

Here are a few of the highlights of this release:

  • The new Qt 3D geometry inspector allows you to look at a wireframe rendering of entity geometries, as well as the raw OpenGL buffer data. Visualizations of normal vectors and backface culling help to identify common problems in geometry

Slaying Latency with Linux Kernel Tracepoints

Knowing what tools are at your disposal when looking to make a program faster or keep it operating smoothly is critical to your success as a programmer. We recently solved a performance problem using Linux Kernel Tracepoints so we thought we’d share the process with you so that you can see for yourself if this tool makes sense in your toolkit.

Our challenge: the database writes in a customer’s application normally took under 5ms but occasionally spiked to over 150ms, …

GammaRay: Taking a deep look into your Qt application Volker Krause

GammaRay is a high-level runtime introspection tool for Qt applications. In this talk we will look at a number of real-world debugging and profiling problems and how the capabilities provided by GammaRay help you with those.

When creating applications we strive to use higher-level frameworks to obtain results quickly and reduce development effort and long-term maintenance cost. This however provides a few challenges during debugging and profiling. With conventional instruction-level tools we have to have a reasonable deep understanding on …

Linux perf for Qt developers Milian Wolff

Are you a Qt developer and do you use Linux as your development platform of choice? Then this talk is for you:

I will introduce you to perf, the Linux tool suite for performance analysis. The talk will not only cover a broad part of what perf has to offer, it will also dive into details in how it is applicable to Qt developers in particular. Afterwards, you will know how to use perf to find CPU hotspots in your

GammaRay 2.6.0 – a major new release

GammaRay Model Inspector.

GammaRay 2.6 brings you three major new features:

  • We merged the previous model and selection models tools into a new, unified QAbstractItemModel inspector, allowing you to now also see selections and cell flags, as well as to inspect deactivated cells.
  • The new Wayland compositor inspector enables you to observe Wayland clients of a QtWayland compositor, including their surface content and event activity.
  • QMetaObject validation will indicate common problems in property or signal/slot declarations that can cause issues

KDAB talks at QtCon 2016


This is a small wrap-up fromQtCon, the biggest Qt event in Europe in 2016, that happened at the beginning of September. At QtCon the Qt community joined forces with the KDE, FSFE and VideoLAN communities, to create an exciting event in the spirit of open collaboration and participation amongst projects.

During QtCon many KDAB engineers gave in-depth technical talks about Qt, QML, Qt3D, OpenGL and the other technologies around Qt development. All the sessions …