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---
name: performance-analysis
description: "Measure before optimizing, identify likely bottlenecks, make a targeted change, and verify the effect."
---
# Performance Analysis Skill
Measure before optimizing, identify likely bottlenecks, make a targeted change, and verify the effect.
## Workflow
### 1. Measure
- Profile before changes
- Establish baseline metrics
- Identify hot paths
### 2. Analyze
- Find actual bottlenecks
- Distinguish CPU vs I/O vs memory
- Consider algorithmic complexity
### 3. Target
- One bottleneck at a time
- Minimal, focused change
- Prefer algorithmic improvements
### 4. Verify
- Re-measure after change
- Compare to baseline
- Check for regressions
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