https://github.com/adoptopenjdk/jitwatch

Log analyser / visualiser for Java HotSpot JIT compiler. Inspect inlining decisions, hot methods, bytecode, and assembly. View results in the JavaFX user interface.
https://github.com/adoptopenjdk/jitwatch

escape-analysis hotspot hotspot-jit-compiler java javafx jit-compiler jitwatch log-analyser

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Log analyser / visualiser for Java HotSpot JIT compiler. Inspect inlining decisions, hot methods, bytecode, and assembly. View results in the JavaFX user interface.

• Host: GitHub
• URL: https://github.com/adoptopenjdk/jitwatch
• Owner: AdoptOpenJDK
• License: other
• Created: 2013-09-30T14:18:17.000Z (over 11 years ago)
• Default Branch: master
• Last Pushed: 2024-10-13T17:31:22.000Z (3 months ago)
• Last Synced: 2025-01-07T18:09:16.412Z (14 days ago)
• Topics: escape-analysis, hotspot, hotspot-jit-compiler, java, javafx, jit-compiler, jitwatch, log-analyser
• Language: Java
• Homepage:
• Size: 5.14 MB
• Stars: 3,113
• Watchers: 159
• Forks: 444
• Open Issues: 13
• Metadata Files:
  • Readme: README.md
  • Contributing: CONTRIBUTING.md
  • Funding: .github/FUNDING.yml
  • License: LICENSE-BSD

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README

        
JITWatch

========

Log analyser and visualiser for the HotSpot JIT compiler.

* Video introduction to JITWatch [video](https://www.youtube.com/watch?v=p7ipmAa9_9E)

* Slides from my LJC lightning talk on JITWatch  [slides](https://chriswhocodes.com/LJC2022.pdf)

For instructions and screenshots see the wiki

https://github.com/AdoptOpenJDK/jitwatch/wiki


The JITWatch user interface is built using JavaFX which is downloaded as a maven dependency for JDK11+.

For pre-JDK11 you will need to use a Java runtime that includes JavaFX.

maven

mvn clean package && java -jar ui/target/jitwatch-ui-shaded.jar


Build an example HotSpot log

# Build the code and then run

cd scripts && ./makeDemoLogFile.sh