Spitfire 0.9.0 release notes
Released: 2026-10-03
- Comparative runs (preview): test the old and new version of a release in two environments at the same time with the same load. Every runner splits its VUs equally between the two arms, load stages change on both arms at the same instant, and a comparison is marked invalid if an arm drops. The live screen overlays A and B with the current difference; the result shows per-step and per-stage differences, warm-up excluded, and a threshold verdict: better, no difference or worse. On a test's page: Run → Comparative run. Confidence intervals, A/A calibration, CI and sequential mode come in later releases.
- In a comparative run the license limits apply to both arms together; the free edition has 1 comparative run a month. Comparative runs need current runners; runners update themselves.
- Fix: the breakpoint test looked at roughly a step's 1st percentile instead of its p95, so a slow tail never broke a step. It now decides on p95.
Updating
Your installation tells you about a new release itself: admins see its notes and the update command for that installation at the top of the UI. The command backs up the database first and keeps the settings (Updating). You can also follow new releases with the RSS feed.