ln-811-performance-profiler

> **Paths:** File paths (`shared/`, `references/`, `../ln-*`) are relative to skills repo root. If not found at CWD, locate this SKILL.md directory and go up one level for repo root. If `shared/` is missing, fetch files via WebFetch from `https://raw.githubusercontent.com/levnikolaevich/claude-code-skills/master/skills/{path}`. # ln-811-performance-profiler **Type:** L3 Worker **Category:** 8XX Optimization Runtime profiler that executes the optimization target, measures multiple metrics (CPU, memory, I/O, time), instruments code for per-function breakdown, and produces a standardized performance map from real data. --- ## Overview | Aspect | Details | |--------|---------| | **Input** | Problem statement: target (file/endpoint/pipeline) + observed metric | | **Output** | Performance map (multi-metric, per-function), suspicion stack, bottleneck classification | | **Pattern** | Discover test → Baseline run → Static analysis → Deep profile → Performance map → Report | --- ## Workflow **Phases:** Test Discovery → Baseline Run → Static Analysis → Deep Profile → Performance Map → Report --- ## Phase 0: Test Discovery/Creation **MANDATORY READ:** Load `shared/references/ci_tool_detection.md` for test framework detection. **MANDATORY READ:** Load `shared/references/benchmark_generation.md` for auto-generating benchmarks when none exist. Find or create commands that exercise the optimization target. Two outputs: `test_command` (profiling/measurement) and `e2e_test_command...