startup-time-profiler

startup-time-profiler

Profile and optimize application startup time, identifying bottlenecks in initialization, module loading, and rendering.

Capabilities

• Measure cold and warm start times
• Identify module loading bottlenecks
• Profile initialization phases
• Generate timeline visualizations
• Provide optimization recommendations
• Set up CI performance tracking

Input Schema

{
  "type": "object",
  "properties": {
    "projectPath": { "type": "string" },
    "framework": { "enum": ["electron", "tauri", "native"] },
    "iterations": { "type": "number", "default": 5 }
  },
  "required": ["projectPath"]
}

Electron Startup Profiling

// Add to main.js
const startTime = Date.now();

app.on('ready', () => {
  console.log(`App ready: ${Date.now() - startTime}ms`);
});

// Enable tracing
app.commandLine.appendSwitch('trace-startup');
app.commandLine.appendSwitch('trace-startup-file', 'startup-trace.json');

Optimization Techniques

1. Lazy load modules
2. Defer non-critical initialization
3. Optimize bundle size
4. Use V8 snapshots
5. Preload critical resources

Benchmarks

| Metric | Good | Acceptable | Poor | |--------|------|------------|------| | Cold start | < 2s | < 4s | > 6s | | Warm start | < 1s | < 2s | > 3s | | Window visible | < 1.5s | < 3s | > 5s |

Related Skills

• memory-leak-detector
• bundle-size-analyzer