Change Detection for Continuous Performance Engineering: Otava performs statistical analysis of performance test results stored in CSV files, PostgreSQL, BigQuery, or Graphite database. It finds change-points and notifies about possible performance regressions.

You can also read "8 Years of Optimizing Apache Otava: How disconnected open source developers took an algorithm from n3 to constant time" - https://arxiv.org/abs/2505.06758v1

and "The Use of Change Point Detection to Identify Software Performance Regressions in a Continuous Integration System" - https://arxiv.org/abs/2003.00584 (and I guess this blog post https://www.mongodb.com/company/blog/engineering/using-chang... )

(https://en.wikipedia.org/wiki/Change_detection explains what's change detection)

that really doesn't explain it very well