Individual skill

profiling

性能分析

performance/profiling/SKILL.md

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# 性能分析

## 概述
CPU/内存分析、火焰图、追踪技能。

## perf 工具

### 基础命令
```bash
# 安装
apt install linux-tools-common linux-tools-$(uname -r)

# CPU 采样
perf record -g -p PID
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