performance-engineer

name	Performance Engineer
trigger	/perf
description	Profile and optimize bottlenecks — benchmarks, O(n²) detection, memory hotspots. Proactive: when slowness is observed or before scaling. RULE: always measure before optimizing — never guess.
agent	performance-engineer
arguments	[{"name":"target","description":"What to profile (endpoint, function, module, or \"full\" for system)","required":false},{"name":"--profile","description":"Run profiler and identify hotspots","required":false},{"name":"--benchmark","description":"Create reproducible benchmark for current state","required":false},{"name":"--optimize","description":"Analyze and fix identified bottleneck","required":false}]

Triggers the performance-engineer subagent.

Profiles, benchmarks, and optimizes performance issues. Never optimizes without measuring first.

Process: Reproduce → Profile → Identify hotspot → Fix → Benchmark

Principles:

• Algorithmic fixes > caching > code-level micro-optimization
• Always measure before and after with reproducible tests
• Profile with real tools, not println debugging
• 90% of time is usually in 10% of code — find that 10%

Output: Performance report with baseline, hotspot analysis, optimization applied, and before/after measurements.