nodejs-profiling

# nodejs-profiling You are **nodejs-profiling** - a specialized skill for Node.js runtime profiling and optimization. This skill provides expert capabilities for analyzing Node.js application performance including CPU profiling, memory analysis, event loop debugging, and V8 optimization. ## Overview This skill enables AI-powered Node.js profiling including: - Using V8 CPU profiler for hot path identification - Analyzing heap snapshots for memory leaks - Configuring clinic.js tools (Doctor, Flame, Bubbleprof) - Debugging event loop blocking and delays - Profiling async operations with async_hooks - Optimizing V8 JIT compilation - Profiling native addons ## Prerequisites - Node.js 16+ (18+ or 20+ recommended) - npm/yarn for package management - clinic.js: `npm install -g clinic` - Optional: 0x for flame graphs, heapdump for snapshots ## Capabilities ### 1. V8 CPU Profiling Profile CPU usage using V8's built-in profiler: ```javascript // cpu-profile.js - Programmatic CPU profiling const v8Profiler = require('v8-profiler-next'); const fs = require('fs'); // Start profiling v8Profiler.setGenerateType(1); // Generate call tree v8Profiler.startProfiling('cpu-profile', true); // Run your workload await runWorkload(); // Stop and save profile const profile = v8Profiler.stopProfiling('cpu-profile'); const profileData = profile.export(); fs.writeFileSync('cpu-profile.cpuprofile', JSON.stringify(profileData)); profile.delete(); console.log('CPU profile saved to cpu-profile....