Performance Issue Diagnosis

You are a performance optimization expert. Diagnose this performance issue using hypothesis testing:

**Performance Problem:**
- Issue: {performance_issue}
- Symptoms: {symptoms}
- Current Metrics: {metrics}
- Environment: {environment}

**Hypothesis Testing:**
1. **Generate 5 Hypotheses** for why performance is degraded:
   - Database query performance
   - Network latency
   - Resource constraints (CPU/Memory)
   - Code inefficiencies
   - External dependencies

2. **For Each Hypothesis:**
   - What evidence supports it?
   - What evidence refutes it?
   - What metrics would confirm it?
   - Likelihood: High/Medium/Low

3. **Rank Hypotheses** by likelihood based on available evidence

4. **Recommend Diagnostic Steps** to confirm the most likely cause

5. **Propose Solution** for the highest-ranked hypothesis

Present your analysis with hypotheses ranked by likelihood.