About

Imported from jeremylongshore/tons-of-skills-marketplace (plugins/performance/performance-regression-detector/skills/detecting-performance-regressions/SKILL.md). Install upstream with npx skills add jeremylongshore/tons-of-skills-marketplace --skill detecting-performance-regressions. Copyright stays with the author (MIT).

Performance Regression Detector

Name: detecting-performance-regressions
Author: jeremylongshore

Detect performance regressions in CI/CD pipelines by comparing response times, throughput, and resource usage against historical baselines using statistical analysis.

Overview

This skill automates the detection of performance regressions within a CI/CD pipeline. It utilizes various methods, including baseline comparison, statistical analysis, and threshold violation checks, to identify performance degradation. The skill provides insights into potential performance bottlenecks and helps maintain application performance.

How It Works

Analyze Performance Data: The plugin gathers performance metrics from the CI/CD environment.
Detect Regressions: It employs methods like baseline comparison, statistical analysis, and threshold checks to detect regressions.
Report Findings: The plugin generates a report summarizing the detected performance regressions and their potential impact.

When to Use This Skill

This skill activates when you need to:

Identify performance regressions in a CI/CD pipeline.
Analyze performance metrics for potential degradation.
Compare current performance against historical baselines.

Examples

Example 1: Identifying a Response Time Regression

User request: "Detect performance regressions in the latest build. Specifically, check for increases in response time."

The skill will:

Analyze response time metrics from the latest build.
Compare the response times against a historical baseline.
Report any statistically significant increases in response time that exceed a defined threshold.

Example 2: Detecting Throughput Degradation

User request: "Analyze throughput for performance regressions after the recent code merge."

The skill will:

Gather throughput data (requests per second) from the post-merge CI/CD run.
Compare the throughput to pre-merge values, looking for statistically significant drops.
Generate a report highlighting any throughput degradation, indicating a potential performance regression.

Best Practices

Define Baselines: Establish clear and representative performance baselines for accurate comparison.
Set Thresholds: Configure appropriate thresholds for identifying significant performance regressions.
Monitor Key Metrics: Focus on monitoring critical performance metrics relevant to the application's behavior.

Integration

This skill can be integrated with other CI/CD tools to automatically trigger regression detection upon new builds or code merges. It can also be combined with reporting plugins to generate detailed performance reports.

Prerequisites

Historical performance baselines in ${CLAUDE_SKILL_DIR}/performance/baselines/
Access to CI/CD performance metrics
Statistical analysis tools
Defined regression thresholds

Instructions

Collect performance metrics from current build
Load historical baseline data
Apply statistical analysis to detect significant changes
Check for threshold violations
Identify specific regressed metrics
Generate regression report with root cause analysis

Output

Performance regression detection report
Statistical comparison with baselines
List of regressed metrics with severity
Visualization of performance trends
Recommendations for investigation

Error Handling

If regression detection fails:

Verify baseline data availability
Check metrics collection configuration
Validate statistical analysis parameters
Ensure threshold definitions are valid
Review CI/CD integration setup

Resources

Statistical process control for performance testing
CI/CD performance testing best practices
Regression detection algorithms
Performance monitoring strategies

Use it

Copy one of these into your project. Installing also returns the manifest and these snippets.

yaml

targets:
  - https://api.opensmartroute.ai/api/v1/registry/jeremylongshore-tons-of-skills-marketplace-detecting-per-fd8600/manifest   # or paste the manifest below

Manifest

An Open Capability Manifest: the router reads it to know what this does, what it costs and when to pick it.

jeremylongshore-tons-of-skills-marketplace-detecting-per-fd8600.ocm.jsonjson

{
  "ocm": "1",
  "id": "jeremylongshore-tons-of-skills-marketplace-detecting-per-fd8600",
  "kind": "skill",
  "name": "detecting-performance-regressions",
  "description": "Automatically detect performance regressions in CI/CD pipelines by comparing metrics against baselines. Use when validating builds or analyzing performance trends. Trigger with phrases like \"detect performance regression\", \"compare performance metrics\", or \"analyze performance degradation\".",
  "publisher": "jeremylongshore",
  "version": "1.0.0",
  "capabilities": {
    "domains": [
      "general"
    ],
    "tags": [
      "skill-md",
      "performance",
      "ci-cd",
      "detecting-performance",
      "skills-sh"
    ],
    "languages": [
      "en"
    ]
  },
  "quality_prior": 0.6,
  "examples": [
    "Automatically detect performance regressions in CI/CD pipelines by comparing metrics against baselines. Use when validating builds or analyzing performance trends. Trigger with phrases like \"detect performance regression\", \"compare performance metrics\", or \"analyze performance degradation\"."
  ],
  "primary": false,
  "metadata": {
    "source": {
      "provider": "skills.sh",
      "repository": "https://github.com/jeremylongshore/tons-of-skills-marketplace",
      "path": "plugins/performance/performance-regression-detector/skills/detecting-performance-regressions/SKILL.md",
      "ref": "HEAD",
      "url": "https://github.com/jeremylongshore/tons-of-skills-marketplace/blob/HEAD/plugins/performance/performance-regression-detector/skills/detecting-performance-regressions/SKILL.md",
      "key": "jeremylongshore/tons-of-skills-marketplace/plugins/performance/performance-regression-detector/skills/detecting-performance-regressions/SKILL.md"
    },
    "compatibility": "Designed for Claude Code",
    "allowed_tools": [
      "Read,",
      "Write,",
      "Edit,",
      "Grep,",
      "Glob,",
      "Bash(ci:*),",
      "Bash(metrics:*),",
      "Bash(testing:*)"
    ],
    "license": "MIT"
  },
  "instructions": "# Performance Regression Detector\n\nDetect performance regressions in CI/CD pipelines by comparing response times, throughput, and resource usage against historical baselines using statistical analysis.\n\n## Overview\n\nThis skill automates the detection of performance regressions within a CI/CD pipeline. It utilizes various methods, including baseline comparison, statistical analysis, and threshold violation checks, to identify performance degradation. The skill provides insights into potential performance bottlenecks and helps maintain application performance.\n\n## How It Works\n\n1. **Analyze Perf",
  "cost": {
    "context_tokens": 942
  }
}

Fetch it by URL: GET /api/v1/registry/jeremylongshore-tons-of-skills-marketplace-detecting-per-fd8600/manifest?version=1.0.0

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