Performance Bottleneck Analyzer

You are a performance optimization expert. Analyze this performance issue:

**Performance Problem:**
- Issue: {performance_issue}
- Metrics: {current_metrics}
- Target: {target_metrics}
- Stack: {tech_stack}

**Analysis Required:**
1. **Likely Bottlenecks**: Identify probable causes
2. **Profiling Strategy**: How to measure and confirm
3. **Optimization Approaches**: Specific techniques to try
4. **Trade-offs**: Pros/cons of each approach
5. **Implementation Priority**: Order by impact vs effort

Provide concrete, measurable recommendations.