YourKit Profiler full changelog

Improvement:
Bundled runtime has been updated.
The OpenSSL library used by the YourKit agent has been updated to version 3.5.6.
Fixed a bug in snapshot loading that caused incorrect timing in call trees and flame graphs. In some cases, the flame graph could appear fragmented, similar to a broken Tetris game.

Windows support:
improvement:
Snapshot loading time on Windows is now consistent whether the profiler window is active or in the background. Previously, due to specifics of the Windows kernel scheduler, loading could be significantly slower when the profiler window was not active – for example, when switching to another application during loading. This issue has been resolved, and performance no longer degrades when loading snapshots in the background.
Docker support:
feature:
You can now download the profiler agent separately for each CPU architecture using a persistent URL (see documentation for details). This simplifies Dockerfiles and reduces download size. In previous versions, all agents for Docker integration were provided as a single ZIP archive.
You need a single line in your Dockerfile to get the profiler agent:
ADD https://www.yourkit.com/dl/agents/linux-x86-64/libyjpagent.so?product=yjp&version=2026.3 /usr/local/lib/
Java Flight Recorder support:
Fixed a crash when resizing columns in the JFR view with many columns.
User interface:
feature:
Multiple "Capture..." toolbar actions — such as "Capture memory snapshot", "Capture performance snapshot", "Capture HPROF snapshot", and "Capture JFR snapshot" — have been consolidated into a single "Capture snapshot" action. This unified action lets you choose both the snapshot type and capture options, improving UX (a single action for similar tasks) and simplifying the toolbar.
Snapshot annotation
feature: You can now add a free-form text annotation to a YourKit snapshot when capturing it. This allows you to describe the problem and relevant conditions for later analysis.
Snapshot annotation:
improvement Significantly improved loading times for large performance snapshots, with up to 80% faster loading in some cases.
Synchronization of live views with the remote agent has been optimized and is now significantly faster.
Saving performance snapshots is

feature:
NetBeans 29 is supported.
improvement:
Bundled runtime and libraries have been updated.
fix:
Incorrect sorting of the "Objects / sec" column in object counting mode.
Incorrect sorting of the "Bytes/sec" column in the "Hot spots by object size" view.

Feature: Eclipse 2026-03 is supported.
Improvement: The OpenSSL library used by the YourKit agent has been updated to version 3.5.5.
Improvement: Bundled runtime and libraries have been updated.

Feature:
Eclipse 2025-12 is supported.
IntelliJ IDEA 2025.3 is supported.
NetBeans 28 is supported.
Improvement:
Bundled runtime and libraries have been updated.

Feature:
IntelliJ IDEA 2025.2 is supported.
Improvement:
Bundled Java runtime has been updated.

Fixed an issue where the profiler might crash on startup on under certain conditions.

Fixed an issue on Linux and macOS where the profiler did not respect the settings in the ~/.yjp/ui.ini file under certain circumstances.

Fixed an issue on Linux and macOS where the profiler did not respect the settings in the ~/.yjp/ui.ini file under certain circumstances.

JVM support:
Feature Java 24 is supported.
Alpine Linux support:
Caveat Minimal supported version of musl C standard library is now 1.2.4.
Networking:
Feature The profiler can now use the AWS CLI to connect to a remote AWS instance and profile your remote Java app by specifying the AWS instance ID.
Profiling via AWS SSM
Improvement When profiling a remote application over SSH, the profiler now detects if SSH port forwarding is disabled on the remote server or if the user has no home directory. This helps identify configuration issues early and prevents confusion when the user cannot attach the profiler to their application.
User interface:
Improvement Navigation drawers now use space more efficiently and do not take up more horizontal space than necessary.
Improvement Capturing a snapshot no longer stops profiling. To stop profiling, use the Stop profiling action in the toolbar.
Improvement Horizontal toolbars in Telemetry charts and Thread states were replaced with vertical ones to save vertical space.
CPU profiling:
Fix Fixed a deadlock that could occur in the OpenJ9 JVM when using virtual threads.
Thread profiling:
Feature Since deadlock analysis is part of thread profiling, we have moved the Deadlocks tab inside the Threads tab. Deadlocks is now a tool within Threads. This change simplifies UI and improves user experience.
Feature The profiler agent now stores Java-level deadlock information in snapshots, enabling post-mortem analysis. In previous versions, deadlocks were only available in live profiling sessions.
Feature The profiler now displays the time spent in a deadlock for deadlocked threads.
Time spent in lock:
Feature An option Focus on selected thread Focus on selected thread has been added. It allows you to estimate CPU usage of only the selected thread.
CPU estimation for selected thread
Feature A new Frozen threads view has been added to the Threads tab. The profiler identifies threads that do not change their stacks or consume CPU time and reports