Skip to content

SpinoChart

SpinoChart

Open-source, Highcharts-free performance reports for Gatling.

SpinoChart reads Gatling binary simulation.log files and generates standalone, interactive HTML dashboards with pure vector SVG charts — 100% MIT-licensed, air-gapped safe, and zero external JS/CSS dependencies.

Why SpinoChart?

While Gatling's core load-testing engine is open-source (Apache 2.0), the standard HTML report generator (gatling-charts-highcharts) is not open source—it is distributed under the proprietary "Gatling Highcharts License," which strictly prohibits modifying the reporting code or extracting the bundled charting library.

SpinoChart provides a 100% open-source, MIT-licensed reporting engine:

  • True Open Source (MIT) — Completely free and open source. Easily passes corporate open-source review boards and legal compliance scanners without non-OSI proprietary licensing exceptions.
  • Zero External Dependencies — Single-file HTML output with embedded CSS and inline vector SVGs. No CDN calls, no tracking, and fully air-gapped compliant.
  • Interactive Visualizations — Clean SVG graphs with custom tooltip crosshairs for response time percentiles, throughput (RPS OK vs KO), and active users over time.
  • Dark & Light Mode — Built-in theme toggling with high-density layouts optimized for performance engineering.
  • Flexible Consumption — Use as a Gradle plugin, a standalone CLI binary, or embed the core library in your own tooling.

Artifacts

SpinoChart is distributed across three modules:

Artifact Coordinates / Asset Purpose
Gradle Plugin uk.co.developmentanddinosaurs.spinochart Automatically generates reports during Gradle Gatling builds
Standalone CLI spinochart (executable binary) Zero-dependency command-line binary for CI/CD and terminal workflows
Core Library uk.co.developmentanddinosaurs.spinochart:spinochart-core Direct Kotlin/Java API for parsing logs and generating HTML

Next Steps