Credits

spark, spark-viewer and spark-docs are free & open source.

• spark is released under the terms of the GNU GPLv3 license.
• spark-viewer is released under the terms of the GNU GPLv3 license.
• spark-docs is released under the terms of the CC-BY-SA-4.0 license.

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spark has two profiler "engines":

• The async engine is a wrapper around async-profiler by apangin.
• The built-in java engine is an improved version of the WarmRoast profiler by sk89q.

The spark-viewer user interface is based on the original WarmRoast UI, with a number of changes and improvements made over the years. The most significant of which was a re-write using the React framework, contributed by astei.

Thanks to all the other contributors to spark, spark-viewer and spark-docs who have made pull requests on GitHub.