🔍 GitHub Actions Workflow Optimization Report - 2025-11-29

[github-actions]

🔍 GitHub Actions Workflow Optimization Report

Generated: 2025-11-29 13:57 UTC
Repository: austenstone/copilot-cli
Analysis Period: Last 1,624 workflow runs

---

📊 Executive Summary

• Total Workflows Analyzed: 14
• Total Runs: 1553
• Average Success Rate: 74.3%
• High-Impact Issues Found: 12

Key Findings

• 🚨 9 workflows with <50% success rate
• 🐌 3 workflows averaging >20 minutes
• 🎲 0 workflows showing flaky behavior

---

📈 Summary Table

Workflow	Runs	Success Rate	Avg Duration	Flake Rate	Status
copilot-triage.yml	852	96.0%	0.6m	0.4%	✅
test-copilot.yml	197	74.6%	21.5m	0.0%	⚠️
copilot-ci-fix.yml	160	28.1%	7.2m	0.0%	🔴
CI	92	0.0%	0.1m	0.0%	🔴
Push on main	67	98.5%	0.9m	0.0%	✅
copilot-comment.yml	46	39.1%	17.4m	0.0%	🔴
copilot-test-tools.yml	37	48.6%	29.5m	0.0%	🔴
copilot-dependabot-update.yml	22	31.8%	57.2m	0.0%	🔴
ci-fix.yml	22	45.5%	1.8m	0.0%	🔴
Fake CI	19	5.3%	0.1m	0.0%	🔴
copilot-research.yml	12	41.7%	1.4m	0.0%	🔴
copilot-pr-review.yml	12	75.0%	1.4m	0.0%	⚠️
copilot-usage-report.yml	9	88.9%	1.8m	0.0%	✅
general.yml	6	33.3%	0.4m	0.0%	🔴

---

🚨 Critical Issues

1. High Failure Rate Workflows

copilot-ci-fix.yml

• Success Rate: 28.1% (45/160 successful)
• Failures: 8 | Cancelled: 37
• Avg Duration: 7.2 minutes
• Impact: HIGH - 160 runs analyzed

CI

• Success Rate: 0.0% (0/92 successful)
• Failures: 92 | Cancelled: 0
• Avg Duration: 0.1 minutes
• Impact: HIGH - 92 runs analyzed

copilot-comment.yml

• Success Rate: 39.1% (18/46 successful)
• Failures: 0 | Cancelled: 3
• Avg Duration: 17.4 minutes
• Impact: HIGH - 46 runs analyzed

copilot-test-tools.yml

• Success Rate: 48.6% (18/37 successful)
• Failures: 1 | Cancelled: 4
• Avg Duration: 29.5 minutes
• Impact: HIGH - 37 runs analyzed

copilot-dependabot-update.yml

• Success Rate: 31.8% (7/22 successful)
• Failures: 3 | Cancelled: 0
• Avg Duration: 57.2 minutes
• Impact: HIGH - 22 runs analyzed

ci-fix.yml

• Success Rate: 45.5% (10/22 successful)
• Failures: 7 | Cancelled: 5
• Avg Duration: 1.8 minutes
• Impact: HIGH - 22 runs analyzed

Fake CI

• Success Rate: 5.3% (1/19 successful)
• Failures: 18 | Cancelled: 0
• Avg Duration: 0.1 minutes
• Impact: HIGH - 19 runs analyzed

copilot-research.yml

• Success Rate: 41.7% (5/12 successful)
• Failures: 0 | Cancelled: 0
• Avg Duration: 1.4 minutes
• Impact: HIGH - 12 runs analyzed

general.yml

• Success Rate: 33.3% (2/6 successful)
• Failures: 0 | Cancelled: 1
• Avg Duration: 0.4 minutes
• Impact: HIGH - 6 runs analyzed

2. Performance Bottlenecks

test-copilot.yml

• Avg Duration: 21.5 minutes
• Total Runs: 197
• Success Rate: 74.6%
• Potential Savings: ~70.6 hours spent in last period

copilot-test-tools.yml

• Avg Duration: 29.5 minutes
• Total Runs: 37
• Success Rate: 48.6%
• Potential Savings: ~18.2 hours spent in last period

copilot-dependabot-update.yml

• Avg Duration: 57.2 minutes
• Total Runs: 22
• Success Rate: 31.8%
• Potential Savings: ~21.0 hours spent in last period

---

💡 High Impact Fixes

Immediate Actions (Week 1)

• Investigate CI workflow - 0% success rate across 92 runs
• Fix copilot-ci-fix.yml - Only 28.1% success rate
• Review copilot-dependabot-update.yml - 57.2 min avg duration
• Address Fake CI - 5.3% success rate, investigate purpose

Short-term Optimizations (2-4 Weeks)

• Optimize copilot-test-tools.yml - Reduce 29.5 min average duration with caching
• Improve copilot-comment.yml - 39.1% success rate needs investigation
• Review test-copilot.yml - 21.5 min duration, check for parallelization opportunities
• Add retry logic to workflows with transient failures
• Implement caching for dependencies (npm, pip, etc.)

Long-term Improvements (1-3 Months)

• Audit workflow triggers - Reduce redundant executions
• Consolidate similar workflows - Multiple copilot-* workflows could be unified
• Add workflow monitoring - Set up alerts for degraded performance
• Document workflow purposes - Especially for workflows with generic names like "CI", "Fake CI"
• Review cancelled runs - Understand why workflows are being cancelled

---

📉 Waste Analysis

Redundant Executions

• copilot-triage.yml: 852 runs (96% success) - Review if all triggers are necessary
• test-copilot.yml: 197 runs - Consider reducing test frequency for non-critical branches

Estimated Waste

• Failed runs compute time: ~908.9 minutes
• High-duration failures: copilot-dependabot-update.yml failing at 57min is costly

---

📋 Detailed Workflow Statistics

All Workflows (>5 runs)

Workflow	Total	Success	Failure	Cancelled	Success Rate	Avg Duration
copilot-triage.yml	852	818	34	0	96.0%	0.6m
test-copilot.yml	197	147	28	19	74.6%	21.5m
copilot-ci-fix.yml	160	45	8	37	28.1%	7.2m
CI	92	0	92	0	0.0%	0.1m
Push on main	67	66	0	0	98.5%	0.9m
copilot-comment.yml	46	18	0	3	39.1%	17.4m
copilot-test-tools.yml	37	18	1	4	48.6%	29.5m
copilot-dependabot-update.yml	22	7	3	0	31.8%	57.2m
ci-fix.yml	22	10	7	5	45.5%	1.8m
Fake CI	19	1	18	0	5.3%	0.1m
copilot-research.yml	12	5	0	0	41.7%	1.4m
copilot-pr-review.yml	12	9	3	0	75.0%	1.4m
copilot-usage-report.yml	9	8	0	1	88.9%	1.8m
general.yml	6	2	0	1	33.3%	0.4m

---

🎯 Success Metrics

Top Performing Workflows:

• ✅ copilot-triage.yml - 96.0% success rate (852 runs)
• ✅ Push on main - 98.5% success rate (67 runs)

---

🔧 Recommended Next Steps

1. Immediate: Investigate the CI workflow with 0% success rate
2. Priority: Fix copilot-ci-fix.yml (28% success) and copilot-comment.yml (39% success)
3. Optimize: Add caching to reduce durations in copilot-dependabot-update.yml (57min) and copilot-test-tools.yml (29min)
4. Monitor: Set up alerts for workflows dropping below 80% success rate
5. Review: Audit all workflow triggers to eliminate redundant executions

---

Report generated by GitHub Actions Workflow Analyzer
For questions or issues, please contact the DevOps team