# Detecting Performance Regressions

> Compare current benchmark results against historical baselines to spot performance regressions. Use as an explicit/manual helper for build-to-build degradation review, not for broad optimization strategy or low-level profiling ownership.

- Skill: `majiayu000/detecting-performance-regressions-2` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/detecting-performance-regressions-2`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/detecting-performance-regressions-2/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- License: MIT
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/detecting-performance-regressions-2

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# Performance Regression Detector

## Positioning

Treat this skill as an explicit/manual helper for benchmark comparison work.

## When to Use

Use this skill when:
- Identify performance regressions in a CI/CD pipeline.
- Analyze performance metrics for potential degradation.
- Compare current performance against historical baselines.

## Not For / Boundaries

- Broad optimization roadmap or tuning backlog: use `providing-performance-optimization-advice`
- Root-cause debugging of a specific slow path: use `systematic-debugging`
- General test artifact packaging without regression judgment: use `generating-test-reports`

## Typical Outputs

- A baseline-vs-current regression summary
- Severity-ranked regressed metrics
- Follow-up questions for deeper profiling or investigation

## Related Skills

- `performance-testing` for benchmark generation
- `providing-performance-optimization-advice` after the regression is confirmed