JMH Visualizer

Visually explore your JMH Benchmarks! Online version at http://jmh.morethan.io!

Comes with 2 companion projects:

• Gradle plugin
• Jenkins plugin

Features

• Serverless architecture - All happens locally in your browser
• Visualize the benchmarks of a single run (one JSON file) grouped by benchmark class
  • Vertical bar-chart with score and score error
  • Link to the original JSON
  • Show individual runs as tooltip
• Compare the benchmarks of 2 runs (two JSON files) grouped by benchmark class
  • Summary of noteable changes
  • Vertical bar-chart from -100% to 100%
  • Link to the original JSON
  • Show score and error of both runs in tooltip
• Compare the benchmarks of multiple runs (n JSON files) grouped by benchmark class
  • Summary of noteable changes
  • Line chart
  • Show score and error on hover
• Visualize secondary metrics like '·gc.alloc.rate'
• Focus on subselection of charts with synced axis scales
• Load benchmarks from external url or gists

Major Changes

• Mar 2021 - 0.9.3 Support Gists containing multiple files
• Aug 2018 - 0.9 Couple of user requested features
• Jul 2018 - 0.8 Revamp Summary Page + Chart transitions
• Jan 2018 - 0.7.3 External URL/Gist support
• Okt 2017 - 0.7 Multi-Run support
• Aug 2017 - 0.6 Layout change & Summary support
• Jul 2017 - 0.5 Focussing of benchmarks
• May 2017 - 0.4 Secondary Metrics support
• Apr 2017 - 0.3 Error Bars & Params support
• Nov 2016 - 0.2: Add 2 run compare view
• Okt 2016 - 0.1: Initial Release

Tips & Tricks

While this app will visualize any valid JMH JSON you throw at it, you can write your benchmarks in a way that make the visualization much more enjoyable...

• Put those benchmarks in a single class which you most likely wanne compare to each other
• On the other hand, don't put to much stuff in a single class/chart (since readability will suffer)
• Don't mix incompatible benchmark styles into one class (like mixing average and single shot is ok, but mixing avarage and throughput doesn't make much sense)
• Sensibly design your package structure, your class name and you methods names, those are reflected in the auto-generated charts
• Keep method names short but meaningful
• The method names reflect initial sort, so if you have benchmarks called 'with1Threads, with10Threads' naming them 'with01Thread, with10Thread' will display nicer

Parameter reference

Contribute

Use the issue tracker and/or open pull requests!

Useful Commands

• npm install Download all necessary npm packages
• npm run lint Lint the javascript files
• npm run test Run tests
• npm run check Run Lint & Test
• npm run watch Continuously build the project
• open build/index.html Open the build project in your default browser
• npm run release Build production version
• npm run deploy Build production version & move it to the github pages fodler

Realease

• Increase version in package.json
• Update README.md in case of major releases
• npm run deploy
• commit & push
• tag with
  • git tag -a $releaseVersion -m "$releaseVersion release"
  • git push --tags

Credits

http://recharts.org/ - The chart ground work

http://www.favicon.cc/ - Created the favicon with

Babel, webpack, react,... and many more for an enjoyable webstack!

Donating