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13 March 2026
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. Hotspot’s goal is to offer a modern alternative to perf report, making performance analysis on Linux systems more intuitive and efficient.
Version 1.6.0 introduces powerful new features, improved workflows, and numerous bug fixes to make profiling even smoother.
This release focuses on usability improvements and extended analysis capabilities. The most notable additions are:
perf.data.zip)Hotspot can now open perf recordings stored inside archives such as perf.data.zip.
This simplifies sharing profiling results, storing CI artifacts, and working with compressed recordings - no manual extraction required.
The Flamegraph view now supports regular expression filtering.
This makes it much easier to:
Especially for large C++ codebases, regex search significantly speeds up navigation.
Regex in the flamegraph
Hotspot 1.6.0 introduces support for tracepoints captured via perf.
This enables analysis of event-based data in addition to traditional sampling, giving deeper insight into system and runtime behavior.
Tracepoints
As usual, this release also includes numerous smaller fixes, UI refinements, and internal cleanups to improve overall stability and user experience.
For a complete overview of all changes, see the full changelog on GitHub.
Happy profiling!
Hotspot - A GUI for perf report:
Hotspot Demo from Embedded World 2022:
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